## A peek inside Gillian Wearing and Claude Cahun: Behind the Mask, Another Mask

Gillian Wearing and Claude Cahun: Behind the Mask, Another Mask by Sarah Howgate draws together for the first time the work of French artist Claude Cahun (1894–1954) and British contemporary artist Gillian Wearing (b. 1963). Although they were born almost a century apart, their work shares similar themes—gender, identity, masquerade, and performance. Take a look inside this stunningly illustrated book containing reproductions of more than ninety key works.

Sarah Howgate is senior curator of contemporary portraits at the National Portrait Gallery, London. She is the coauthor of Lucian Freund Portraits, 21st-Century Portraits and The Portrait Now. Dawn Ades is professor emerita of art history at the University of Essex and the author of Art in Latin America: The Modern Era, 1820–1980, among many other books.

## We Work in the Dark: The Child Labor Photography of Lewis Hine

In Soulmaker, Alexander Nemerov (Wartime Kiss) examines the work of photographer Lewis Hine. Working for the National Child Labor Committee, Hine travelled the United States for several years photographing children at work. From textile mills to coal mines, Hine’s images showed young children in arduous and dangerous working conditions. His work played an important role in the campaign for reform of child labor laws that ultimately resulted in the Fair Labor Standards Act of 1938.

Hine’s photographs are a close and disturbing window on the child labor system of the early 1900s. Beyond unvarnished documentary, these images are possessed of deep emotional resonance and an often eerie beauty. Nemerov highlights the fragility and ephemerality of the lives captured in Hine’s photographs. Here we present a selection from the photographs used in Soulmaker.

All images are courtesy the Library of Congress

## The Arab Imago: A slideshow of portrait photography

The dawn of photography coincided with the expansion of European imperialism; as a result, many of the oldest photographs from the Middle East come from the skewed colonial perspective of Europeans. In his forthcoming book, The Arab Imago: A Social History of Portrait Photography 1860-1910Stephen Sheehi offers an alternative history via numerous Arab and Armenian photographers who created their own images of Middle Eastern people. Sheehi seeks to define the past by these insider photographs, not the Orientalist pictures first circulated by foreign photographers. Many of the images come from posed studio portraits, showcasing the intricacy and clarity of the style, as well as the wide range of people who chose to be photographed.

This slideshow represents just a small selection of the early photographs featured in the book. Click on an image to enlarge and read the caption.

## Affordable Housing in New York: An Exhibition

From February 10, 2016 to May 15, 2016, the Hunter East Harlem Gallery in New York is hosting a new exhibition called Affordable Housing in New York: The People, Places, and Policies that Transformed a City, as a gallery component to the book by Matthew Gordon Lasner and Nicholas Dagen Bloom. The exhibition is free and open to the public.

Via Verde Bronx 2012, Model and plan by Matthias Altwicker, Alexander MacVicar. Christopher Alvarez, Kevin Kawiecki, photo by Eduard Hueber archphoto

The exhibition features original photographs by award-wining visual sociologist David Schalliol, interactive models of apartment interiors, and archival and other material that immerse visitors in New York City’s unique system of for low- and middle-income housing. Also on display are photographs from Project Lives, a program that provided cameras and photography classes to residents of public housing. The exhibition will be accompanied by several public programs, including walking tours and panel discussions.

This exhibition is brought to you by Hunter College Art Galleries, the Hunter College President’s Fund for Faculty Advancement, the New York Institute of Technology: School of Architecture and College of Arts and Sciences, The Journal of Planning History, and Princeton University Press.

## Bird Fact Friday – Where do penguins live?

From page 16 of Penguins:

A popular misconception is that all penguins live around the poles. Penguins are actually constrained to the southern hemisphere, but only four species of 18 (or 19, depending on the taxonomy used) form colonies along parts of the Antarctic coastline, remaining at least 1200 km (745 miles) from the South Pole. The entire ‘crested dynasty’ (seven species), live in slightly milder climates, mostly north of the Polar Front, nesting on subantarctic islands. Still others make their homes in Australia, New Zealand, and the Galapagos Islands. Many penguins live in areas so remote that they are rarely observed or photographed.

Penguins: The Ultimate Guide
Tui De Roy, Mark Jones & Julie Cornthwaite

Penguins are perhaps the most beloved birds. On land, their behavior appears so humorous and expressive that we can be excused for attributing to them moods and foibles similar to our own. Few realize how complex and mysterious their private lives truly are, as most of their existence takes place far from our prying eyes, hidden beneath the ocean waves. This stunningly illustrated book provides a unique look at these extraordinary creatures and the cutting-edge science that is helping us to better understand them. Featuring more than 400 breathtaking photos, this is the ultimate guide to all 18 species of penguins, including those with retiring personalities or nocturnal habits that tend to be overlooked and rarely photographed.

A book that no bird enthusiast or armchair naturalist should do without, Penguins includes discussions of penguin conservation, informative species profiles, fascinating penguin facts, and tips on where to see penguins in the wild.

• Covers all 18 species of the world’s penguins
• Features more than 400 photos
• Explores the latest science on penguins and their conservation
• Includes informative species profiles and fascinating penguin facts

## Nicholas Higham on Mathematics in Color

We are excited to be running a series of posts on applied mathematics by Nicholas Higham over the next few weeks. Higham is editor of The Princeton Companion to Applied Mathematics, which is out this month. A slightly longer version of this post on color in mathematics can be found on Higham’s blog, and it has been cross posted at John Cook’s blog, The Endeavour. —PUP Blog Editor

Color is a fascinating subject. Important early contributions to our understanding of it came from physicists and mathematicians such as Newton, Young, Grassmann, Maxwell, and Helmholtz. Today, the science of color measurement and description is well established and we rely on it in our daily lives, from when we view images on a computer screen to when we order paint, wallpaper, or a car, of a specified color.

For practical purposes color space, as perceived by humans, is three-dimensional, because our retinas have three different types of cones, which have peak sensitivities at wavelengths corresponding roughly to red, green, and blue. It’s therefore possible to use linear algebra in three dimensions to analyze various aspects of color.

## Metamerism

A good example of the use of linear algebra is to understand metamerism, which is the phenomenon whereby two objects can appear to have the same color but are actually giving off light having different spectral decompositions. This is something we are usually unaware of, but it is welcome in that color output systems (such as televisions and computer monitors) rely on it.

Mathematically, the response of the cones on the retina to light can be modeled as a matrix-vector product $Af$, where $A$ is a 3-by-$n$ matrix and $f$ is an $n$-vector that contains samples of the spectral distribution of the light hitting the retina. The parameter $n$ is a discretization parameter that is typically about 80 in practice. Metamerism corresponds to the fact that $Af_1 = Af_2$ is possible for different vectors $f_1$ and $f_2$. This equation is equivalent to saying that $Ag = 0$ for a nonzero vector $g =f_1-f_2$, or, in other words, that a matrix with fewer rows than columns has a nontrivial null space.

Metamerism is not always welcome. If you have ever printed your photographs on an inkjet printer you may have observed that a print that looked fine when viewed indoors under tungsten lighting can have a color cast when viewed in daylight.

## LAB Space: Separating Color from Luminosity

In digital imaging the term channel refers to the grayscale image representing the values of the pixels in one of the coordinates, most often R, G, or B (for red, green, and blue) in an RGB image. It is sometimes said that an image has ten channels. The number ten is arrived at by combining coordinates from the representation of an image in three different color spaces. RGB supplies three channels, a space called LAB (pronounced “ell-A-B”) provides another three channels, and the last four channels are from CMYK (cyan, magenta, yellow, black), the color space in which all printing is done.

LAB is a rather esoteric color space that separates luminosity (or lightness, the L coordinate) from color (the A and B coordinates). In recent years photographers have realized that LAB can be very useful for image manipulations, allowing certain things to be done much more easily than in RGB. This usage is an example of a technique used all the time by mathematicians: if we can’t solve a problem in a given form then we transform it into another representation of the problem that we can solve.

As an example of the power of LAB space, consider this image of aeroplanes at Schiphol airport.

Original image.

Suppose that KLM are considering changing their livery from blue to pink. How can the image be edited to illustrate how the new livery would look? “Painting in” the new color over the old using the brush tool in image editing software would be a painstaking task (note the many windows to paint around and the darker blue in the shadow area under the tail). The next image was produced in
just a few seconds.

Image converted to LAB space and A channel flipped.

How was it done? The image was converted from RGB to LAB space (which is a nonlinear transformation) and then the coordinates of the A channel were replaced by their negatives. Why did this work? The A channel represents color on a green–magenta axis (and the B channel on a blue–yellow axis). Apart from the blue fuselage, most pixels have a small A component, so reversing the sign of this component doesn’t make much difference to them. But for the blue, which has a negative A component, this flipping of the A channel adds just enough magenta to make the planes pink.

You may recall from earlier this year the infamous photo of a dress that generated a huge amount of interest on the web because some viewers perceived the dress as being blue and black while others saw it as white and gold. A recent paper What Can We Learn from a Dress with Ambiguous Colors? analyzes both the photo and the original dress using LAB coordinates. One reason for using LAB in this context is its device independence, which contrasts with RGB, for which the coordinates have no universally agreed meaning.

## The Princeton Companion to Applied Mathematics

Nicholas J. Higham is the Richardson Professor of Applied Mathematics at The University of Manchester, and editor of The Princeton Companion to Applied Mathematics. His article Color Spaces and Digital Imaging in The Princeton Companion to Applied Mathematics gives an introduction to the mathematics of color and the representation and manipulation of digital images. In particular, it emphasizes the role of linear algebra in modeling color and gives more detail on LAB space.

## Bird Fact Friday – Passenger Pigeons

From the appendix of The Passenger Pigeon:

The Passenger Pigeon had a typical high-speed wing, a feature shared with other fast-flying birds such as the Peregrine Falcon, in which the wings are long and narrow. The Passenger Pigeon was one of the fastest-flying birds.

The Passenger Pigeon
Errol Fuller
Introduction

At the start of the nineteenth century, Passenger Pigeons were perhaps the most abundant birds on the planet, numbering literally in the billions. The flocks were so large and so dense that they blackened the skies, even blotting out the sun for days at a stretch. Yet by the end of the century, the most common bird in North America had vanished from the wild. In 1914, the last known representative of her species, Martha, died in a cage at the Cincinnati Zoo.

This stunningly illustrated book tells the astonishing story of North America’s Passenger Pigeon, a bird species that—like the Tyrannosaur, the Mammoth, and the Dodo—has become one of the great icons of extinction. Errol Fuller describes how these fast, agile, and handsomely plumaged birds were immortalized by the ornithologist and painter John James Audubon, and captured the imagination of writers such as James Fenimore Cooper, Henry David Thoreau, and Mark Twain. He shows how widespread deforestation, the demand for cheap and plentiful pigeon meat, and the indiscriminate killing of Passenger Pigeons for sport led to their catastrophic decline. Fuller provides an evocative memorial to a bird species that was once so important to the ecology of North America, and reminds us of just how fragile the natural world can be.

Published in the centennial year of Martha’s death, The Passenger Pigeon features rare archival images as well as haunting photos of live birds.

## Ai Weiwei exhibition at Blenheim Palace: Our UK publicity assistant investigates!

Visitors can expect to experience something different this autumn at Blenheim Palace. Tradition meets modernity as the 18th century baroque architecture of Blenheim, the birthplace of wartime British Prime Minister Sir Winston Churchill, is host to an exhibition of the artwork of Chinese artist and dissident Ai Weiwei.

This exciting exhibition is especially relevant to Princeton University Press for two reasons: not only is Blenheim Palace a stone’s throw from Princeton University Press’s European office in Woodstock, Oxfordshire, but Princeton University Press published Ai Weiwei’s ‘Little Black Book’, Weiwei-isms, last year.

Weiwei-isms is a collection of quotes demonstrating Ai Weiwei’s thoughts on key aspects of his art, politics and life, carefully selected by Larry Warsh from articles, tweets and interviews.

“Everything is art. Everything is politics.” — Weiwei-isms

Like Weiwei-isms, the exhibition at Blenheim Palace clearly demonstrates Ai Weiwei’s commitment to art as a powerful political statement, as a means of reacting against injustice, and inspiring others to do the same.

“I want people to see their own power.” — Weiwei-isms

This certainly becomes clear as you enter the exhibition. You are given a leaflet which serves as a guide to Ai’s artwork, dispersed throughout the rooms of the palace. Despite this, none of the artwork is signposted and it becomes the visitor’s responsibility to seek it out and take meaning and inspiration from what they see.

The collection brings together pieces created by the artist over the past 30 years. It is especially impressive given that it was curated remotely, Ai Weiwei having been under house arrest since 2011. The old and new are often brought together, with artefacts from the past being reimagined in novel ways. Take, for example, the Han Dynasty vases transformed beyond recognition by car paint or by being ‘rebranded’ with the Coca Cola logo.

His ‘Circle of Animals/Zodiac Heads’ (2010), previously displayed at a year-long exhibition at Princeton University, is also at Blenheim. This work is an ironic interpretation of the bronze zodiac head statues that were looted from the Emperor’s summer palace (Yuan Ming Yuan) in Beijing in 1860.

Other highlights include ‘He Xie’ (2012), a work comprised of 2,300 porcelain crabs on the floor of the Red Drawing Room (‘He Xie’, meaning ‘river crabs’, puns on the Chinese phrase for ‘harmony’).

While some pieces are the first thing you see when you walk into a room, other pieces are integrated more subtly into the sumptuous interiors of Blenheim Palace. The Wave Plate (2014) is seamlessly integrated into the lavish table decoration as the centrepiece in the Salon, and a pair of handcuffs made of Huali wood (2012) – a reminder of Ai Weiwei’s current situation – placed suggestively on the bed in Churchill’s birth room might escape your attention due to the large number of visitors moving from room to room, all engrossed in the same treasure hunt as you.

All in all, the collaboration between Blenheim Palace and Ai Weiwei really does merit a visit. Ai Weiwei’s work is all the more interesting and thought-provoking for being situated in the context of Blenheim Palace and its grounds.

The exhibition at Blenheim Palace highlights the ‘clash’ of the old and new, which is indeed something that is key to much of Ai Weiwei’s work.

“If a nation cannot face its past, it has no future.” — Weiwei-isms

In years to come, the Ai Weiwei exhibition at Blenheim Palace is sure to become part of the artist’s legacy and a poignant reminder of his struggle for justice and truth.

“The art always wins. Anything can happen to me, but the art will stay.” — Weiwei-isms

The exhibition runs until 14th December.

## 10 facts about penguins that will make you wish you were one of them

In case you haven’t noticed, penguins have become a cultural phenomenon in recent years. From “March of the Penguins” with Morgan Freeman’s narration, to Happy Feet, Surfs Up, and their respective sequels, penguins are as captivating as ever. (I myself adopted a penguin for a year from the Philadelphia Zoo) And let’s face it, being a human can be overrated and sometimes it’s fun to just imagine what life would be like as another specie. Here are 10 facts about penguins from Tui De Roy’s, Mark Jones’s, and Julie Cornthwaite’s new book Penguins: The Ultimate Guide that will make you wish you were one of them.

Penguins: The Ultimate Guide, Pg. 173

1.    Penguins are exceptionally fast swimmers, clocking in at 22mph. Michael Phelps, in comparison, swims at just under 4.5 mph.

2.    Have you ever opened your eyes underwater and felt the sting of the salt or chlorine? Penguins haven’t! Clear nicitating membranes serve as see-through underwater goggles.

3.    Trust issues? Some species of penguins remain monogamous to their mates for more than one season. *Queue “aww”*

4.    Smaller penguin species like the Rockhoppers leave their half-grown chicks huddling together for safety while the grown-ups “grab some grub.” These are called “crèches” and the chicks are supervised by non-breeding penguin neighbors aka baby, or should we say “penguin,” sitters you can trust.

5.    Tired of hearing terrible pick-up lines or getting “poked” on Facebook? Penguins carry out exuberant courtship displays like sky-pointing and “ecstatic greetings.”

6.    They say if you’re ever stranded at sea, don’t drink the water, it’ll only dehydrate you faster, but penguins can process seawater by means of large salt-extracting glands in their foreheads.

Pg. 28

7.    Never play hide and seek with penguins. Their binocular vision is as good as that of owls.

8.    Despite their awkward wobble, Penguins are impressively built. Dual purpose feet allow them to easily walk across wet and slippery surfaces while their surprisingly long (but mostly hidden) legs let them commute several kilometers to their nests.

9.    Wouldn’t you like to live in a world with gender-equality? Penguins do! Males and females rarely show gender differences. In fact, it is the male Emperor Penguin who incubates the egg while the female forages for food.

10.    When it comes to fashion, penguins never have to sacrifice form for function (or the other way around). Their sleek—and chic!—coats consists of around 15 feathers per square centimeter, the densest plumage of any bird.

## 10 interesting facts about bees

When I was asked to write a post about bees, I felt a lump the size of a honeycomb rise in my throat. I thought to myself,  “Bees? Like the things that ruined my 8th birthday party or every trip I’ve ever taken to Rita’s Ices? Those things?!” Yes, those things, but amazingly enough, after reading through Noah Wilson-Rich’s new book The Bee: A Natural History, I can honestly say my opinion of bees has changed, for the better. Here are 10 interesting facts about bees that will hopefully either solidify your love of these insects or foster a new appreciation for them.

1. Thousands of years ago, bees evolved from carnivores to herbivores. Maybe this explains my initial irrational fear of them!

2. There are over 20,000 species of bees who are classified in nine families and further divided by short, medium, and long tongues.

The Bee: A Natural History, Pg. 67

3. Bees can see ultra violet rays. They see the world primarily in purples and blues.

4. Bees have just ten receptors for taste, but 163 receptors for smell.

5. Honey bees communicate via dancing. The Round dance communicates the nearby presence of food. The Waggle dance is used to communicate the location of a food source more than 165ft away from the hive. The direction, distance, and quality of the food is made known through the Waggle. If a threat is detected near the food, another bee will interrupt the dancing bee with a head-butt.

6. In 2000, honey bees provided an estimated \$14.6 billion to the US economy.

Pg. 49

7. Only female bees sting.

8. Queen bees and worker bees share the same genes, the only difference is future queen bees are given extra rations of royal jelly.

9. Bees pollinate over 130 fruits and vegetables.

10. Flowering plants developed attractive, scented, and brightly colored flowers once bees changed their foraging preference from animal protein to a vegetarian lifestyle.

## Announcing the #PhotoBigDay

The brainchild of Tom Stephenson and Scott Whittle, co-authors of The Warbler Guide, the Photo Big Day presents a fun, new challenge for birders of all levels. Big Days are established fundraising events — teams of four birders head out to spot as many birds as they can in the span of 24 hours. The big difference this time around is that every sighting has to be documented on film.

We are proud to be co-sponsoring and supporting this effort and we hope you will check out more information at the links below. Good luck to Team Warbler!!!

http://www.bigbirdphotoday.org Find out about big photo days, start your own team, raise funds, and more!

http://www.listing.aba.org The official home of big day lists, allows ABA members to upload their totals and results and see records for any area, and will also be live blogging and tweeting the Big Photo Day!

http://www.warblerguide.com Scott Whittle and Tom Stephenson’s site, with info on the Big Photo Day, and much more

And find out more with #PhotoBigDay

## Princeton University Press Europe at the Oxford Literary Festival 2014

By Hannah Dummett, Princeton University Press Europe intern

Last Sunday marked the end of the 2014 Oxford Literary Festival: “bigger, better and more ambitious than ever”. A whirlwind nine days of authors, talks, photographers, book signings and  lunches, and amongst all of it the Princeton authors met with full auditoriums and avid audiences, often followed by a glass of Prosecco in the green room.

The Soul of the World author Roger Scruton had the audience in stitches of laughter (perhaps not what you’d expect from a talk by a philosopher) as he shed light on his idea of the sacred, at the same time as shamelessly, and hilariously, plugging his new books. Meanwhile, David Edmonds entered a lively discussion with Nigel Warburton. The audience were eager to join in and soon the topic of moral dilemma had led to a debate on the fate of flight MH370.

As one of the festival’s better-known authors, Alexander McCall Smith was hounded by the ‘literary paparazzi’, and one of our publicists was even coerced into being used as a photographer’s assistant (read: prop-holder). Over at Christ Church, Averil Cameron took us back more than 2500 years in time and explained why Byzantium is key to our understanding of other historical periods. Michael Scott argued his own case for the Greek city of Delphi – and gave us all a reason to visit this summer.

His book may be over 800 pages long, but Robert Bartlett kept things succinct and made sure that his audience were keen to discover what the other 700 pages hold in store. He was even awarded a printed apology from the Oxford Mail’s Jeremy Smith after he commented on Bartlett’s “modest attire” while introducing the talk. Husband and wife astronomer/authors Jacqueline and Simon Mitton, both struck down with a virus picked up on a recent cruise, put on a brave face despite their illness and managed to plunge their audience into the depths of the history of the universe, visiting far-away galaxies via new-born stars and black holes.

The increasingly relevant topic of narcissism and self-love was examined by Simon Blackburn, discussing his new book Mirror, Mirror, and political journalist Edmund Fawcett kept the audience listening with an absorbing talk on differing forms of liberalism. To top it off, the “charming, charismatic” Ian Goldin gave an excellent lecture on how the recent financial crash could have an extreme effect on a wide range of factors in our everyday lives. We’ve been out of the office again this week, this time for London Book Fair – the fun is non-stop this month!