Monthly Archives: June 2017

Book Review: The St. Louis Veiled Prophet Celebration (Thomas Spencer 2000)

Rating: 3.5/5

St. Louis Veiled Prophet Celebration: Power on Parade, 1877-1995 details a strange institution in my hometown of St. Louis, Missouri. The Veiled Prophet celebration was St. Louis’ response to New Orleans’ Mardi Gras. Mardi Gras inverts the social order; the fool is king for a day, and the rich man mingles with the poor man. The Veiled Prophet celebration was created to reinforce the social order, to show the lower classes the differences between them and the leading luminaries. Veiled Prophet details the evolution of this celebration; it began in 1878 in response to a massive labor strike in 1877, and continues to this day, although less overtly political.


Starting in the late 1970s, The Veiled Prophet society organized the Fourth of July celebration in St. Louis. Until 1992, the celebration was called the VP Fair (today it is called Fair St. Louis). When I learned with bafflement that the VP stood for “Veiled Prophet,” I grew curious. The Veiled Prophet society is such an old tradition in St. Louis, but little talked about, due to lack of interest and the elitist threads of the society. But many of the most influential St. Louisans took part in this strange organization; it’s a part of St. Louis history and shapes today’s city. Many of you even know a queen of the Veiled Prophet Ball—Ellie Kemper, perhaps better known as Kimmy Schmidt.


The Veiled Prophet society, to the extent folks even remember it today, has a reputation for being snobbish and racist. It was unsurprising to learn that the society formed to praise the strong hand of business in the face of labor unrest. (For more about 19th century labor unrest, Death in the Haymarket is a great book; I reviewed it here.)

Initially, the parade anchored the celebration, timed to revive the St. Louis Agricultural and Mechanical Fair in October. It was an attempt, although too late, to compete with Chicago. The Veiled Prophet was a robed man, his face hidden, that oversaw the parade. The first Veiled Prophet was Police Commissioner John Priest, an active foe of the prior year’s labor riots. After Priest voluntarily unveiled himself in 1878, the Prophet’s identity remained secret, revealed only once by a crazed caper in 1972.

The celebration evolved with time. Some decades the parade would be educational, others more lighthearted. With time, the Veiled Prophet Ball became the more important component; at its peak it was covered in minute detail in the local papers, and even broadcast nationally after World War 2. The Veiled Prophet character evolved too. Originally just a title, they eventually added a mythology of an exotic easterner.

The relationship between the organization and the media changed substantially with time as well. The Republic was owned by members of the society, and thus covered the events in detail. More recent coverage has been more critical.

I also enjoyed reading about the people involved, though there was less of this than I would have liked. David R. Francis, the man who brought the Olympics and the World’s Fair to St. Louis, was an active member. One of the first members, Alonzo Slayback, died after a fight with a newspaperman. The 1927 Veiled Prophet queen was, scandalously, already married at the time she became queen, and, even worse, without her father’s permission! In an interview in 1977, she mused that the society still hadn’t gotten over it.


Although Veiled Prophet is meticulously researched, it is fairly dry. It reads like a list of facts and newspaper archives more than a narrative. The roles of the people involved in the society are only lightly sketched. This meant the book was shorter, but less relatable.

Also absent is any local St. Louis history. The World’s Fair, the tornado of 1896, mayoral elections and politics, various strikes—these events do not appear in the book.

The book stays narrowly focused on the Veiled Prophet society, for good or ill. I would have preferred more context. This book is, for the most part, just the facts, and less interpretation than some other works of history.


This book is a 5/5 for content about the society and quality of sources. The writing quality is fine, but the narrow approach of the topic makes it a dry read. For someone interested in St. Louis history, it is well worthwhile. I found it less enjoyable and informative than I had hoped; I wanted to better understand St. Louis history, the Veiled Prophet context in that history, and how St. Louis differed from other cities in this respect. This book doesn’t offer a lot of interpretation for the reader. Not everybody wants that, but I was hoping for it.

Turing Patterns: What do a leopard’s spots, vegetation in arid zones, and the formation of fingers have in common?

Please excuse my inconsistent posting of late, I have been deep down the rabbit hole of science. Last week, I attended the Society of Industrial and Applied Math (SIAM) dynamical systems conference. What fun!

I learned about Turing Patterns, named for mathematician Alan Turing. Complex patterns can arise from the balance between the diffusion of chemicals and the reaction of those chemicals. For this reason, Turing’s model is also called the Reaction-Diffusion model. In general, these kinds of patterns can arise when there’s some kind of competition.

This sounds abstract, but suspected examples in nature abound. Have you ever wondered how the leopard got his spots or what’s behind the patterns on seashells? We often don’t know the chemical mechanisms that produce the patterns, but we can mathematically reproduce them with generic models.

Image from discussion of Turing patterns.

Mary Silber and her grad student Karna Gowda presented research on Turing patterns in the vegetation of arid regions. When there isn’t enough precipitation to support uniform vegetation, what vegetation will you observe? If there’s too little water, their model yields a vegetation-free desert. Between “not enough” and “plenty” the model generates patterns, from spots to labyrinths to gaps. Their work expands at least two decades worth of study of Turing patterns in vegetation.


Figure by Karna Gowda, see the full article at SIAM news.

Silber and Gowda considered an area in the Horn of Africa (the bit that juts east below the Middle East). Here, stable patterns in the vegetation have been documented since the 1950s. They wanted to know how the patterns have changed with time. Have the wavelengths between vegetation bands changed? Are there signs of distress due to climate change? By comparing pictures taken by the RAF in the 1950s to recent satellite images, they found that the pattern were remarkably stable. The bands slowly travelled uphill, but they had the same wavelength and the same pattern. They only observed damage in areas with lots of new roads.


From google maps of the Horn of Africa! I screen-capped this from here.

Turing patterns have even been studied experimentally in zebrafish. Zebrafish stripes might appear stationary, but they will slowly change in response to perturbations. So scientists did just. Below is a figure from the paper. The left shows the pattern on the zebrafish, the right shows the predictions of the model.


Experimental perturbations to the patterns of zebrafish are well-predicted by the Turing model. Read more in this excellent Science paper.

The model has been used to explain the distribution of feather buds in chicks and hair follicles in mice. Turing’s equations have even been used to explain how fingers form.

If you want to learn more, the links above are a great start. And if you want to play with the patterns yourself, check out this super fun interactive. These waves aren’t stationary like the Turing patterns I described here, but they arise from similar mathematics. The interactive can make your computer work, fyi.


Reaction-diffusion pattern I generated with this online interactive. It’s super fun!