Maria Sibylla Merian\u27s Frogs

Maria Sibylla Merian (German, 1647-1717) is best known for her magnificent 1705 publication, Metamorphosis insectorum surinamensium, although she published earlier works on insect metamorphosis. Merian wrote the text and painted all of the illustrations for her books, and for the early volumes she produced most of the engravings. Contemporary scholarship has focused primarily on Merian\u27s detailed images of lepidopteran and host plant life cycles, but Merian\u27s Surinam album also portrays anuram metamorphosis, including the first European depiction of Pipa pipa

The History and Influence of Maria Sibylla Merian\u27s Bird-Eating Tarantula: Circulating Images and the Production of Natural Knowledge

Chapter Summary: A 2009 exhibition at the Fitzwilliam Museum on the confluence of science and the visual arts included a plate from a nineteenth-century encyclopedia owned by Charles Darwin showing a tarantula poised over a dead bird (figure 3.1).1 The genesis of this startling scene was a work by Maria Sibylla Merian (German, 1647–1717), and the history of this image says much about how knowledge of the New World was obtained, and how it was transmitted to the studies and private libraries of Europe, and from there into popular works like Darwin’s encyclopedia. It is unlikely that Merian ever imagined the future longevity and influence of her images and text, but her visual records, like those of other naturalist/artists, were employed by Buffon, Linnaeus, and others in their efforts to understand and order plants and animals from around the world. [excerpt] Book Summary: This volume offers fresh perspectives on key elements of science in societies throughout Spanish America, Europe, West Africa, India, and Asia as they overlapped increasingly during the Age of Revolutions—an era of rapidly expanding scientific investigation—as well as the role of scientific change and development in tightening global and imperial connections

Leonardo and the Whale

Around 1480, when he was 28 years old, Leonardo da Vinci recorded what may have been a seminal event in his life. In writing of his travels to view nature he recounted an experience in a cave in the Tuscan countryside: Having wandered for some distance among overhanging rocks, I can to the entrance of a great cavern... [and after some hesitation I entered] drawn by a desire to see whether there might be any marvelous thing within... [excerpt

Scaling limits of weakly asymmetric interfaces

We consider three models of evolving interfaces intimately related to the weakly asymmetric simple exclusion process with $N$ particles on a finite lattice of $2N$ sites. Our Model 1 defines an evolving bridge on $[0,1]$, our Model 1-w an evolving excursion on $[0,1]$ while our Model 2 consists of an evolving pair of non-crossing bridges on $[0,1]$. Based on the observation that the invariant measures of the dynamics depend on the area under (or between) the interface(s), we characterise the scaling limits of the invariant measures when the asymmetry of the exclusion process scales like $N^{-\frac{3}{2}}$. Then, we show that the scaling limits of the dynamics themselves are expressed in terms of variants of the stochastic heat equation. In particular, in Model 1-w we obtain the well-studied reflected stochastic heat equation introduced by Nualart and Pardoux

Maria Sibylla Merian (1647-1717): Pioneering Naturalist, Artist, and Inspiration for Catesby

Book Summary: While accessible to the interested general reader, it is a technical standard that is usable academically. Containing significant new information, this work is the most comprehensive and accurate book written about Catesby and is the legacy of the Catesby Commemorative Trust’s Mark Catesby Tercentennial symposium held in 2012. Chapter Summary: Merian\u27s books on European and Surinamese insects and plants provided new models for representing nature that were echoed in the work of artists and naturalists working in the eighteenth century and beyond. This chapter discusses how Mark Catesby, the subject of the book, was particularly influenced by Merian

Loathsome Beasts: Images of Reptiles and Amphibians in Art and Science

The mythology and symbolism historically associated with reptiles and amphibians is unequaled by that of any other taxonomic group of animals. Even today, these creatures serve as icons - often indicating magic or evil - in a variety of media. Reptiles and amphibians also differ from other vertebrates (i.e. fish, mammals and birds) in that most have never been valued in Europe as food or for sport. Aside from some limited medicinal uses and the medical concerns related to venomous species, there was little utilitarian value in studying the natural history of reptiles and amphibians. Because of this history and other characteristics of these animals, the images of reptiles and amphibians played a unique role in the study of natural history from the Medieval through the Early Modern periods. The images I will discuss come from books that have been analyzed by other scholars, but in most cases there has been little or no scrutiny of the portrayal of the herpetofauna. Because much of my research as a biologist has focused on reptiles and amphibians, I will consider their differences from mammals and birds. In doing so, I will address image content from a somewhat different point of view than that of an art or science historian. My contention is that understanding the evolving portrayal of these “loathsome beasts” is particularly useful in tracing the development of the study of natural history. I also will address how changes in these images over time reflect a transformation in how nature was viewed and valued in western European culture. [excerpt

Conditioning the logistic branching process on non-extinction

We consider a birth and death process in which death is due to both `natural death' and to competition between individuals, modelled as a quadratic function of population size. The resulting `logistic branching process' has been proposed as a model for numbers of individuals in populations competing for some resource, or for numbers of species. However, because of the quadratic death rate, even if the intrinsic growth rate is positive, the population will, with probability one, die out in finite time. There is considerable interest in understanding the process conditioned on non-extinction. In this paper, we exploit a connection with the ancestral selection graph of population genetics to find expressions for the transition rates in the logistic branching process conditioned on survival until some fixed time $T$, in terms of the distribution of a certain one-dimensional diffusion process at time $T$. We also find the probability generating function of the Yaglom distribution of the process and rather explicit expressions for the transition rates for the so-called Q-process, that is the logistic branching process conditioned to stay alive into the indefinite future. For this process, one can write down the joint generator of the (time-reversed) total population size and what in population genetics would be called the `genealogy' and in phylogenetics would be called the `reconstructed tree' of a sample from the population. We explore some ramifications of these calculations numerically

Review of Eye of Newt and Toe of Frog, Adder’s Fork and Lizards’ Leg, the Lore and Mythology of Amphibians and Reptiles

A review of Marty Crump\u27s book on the folklore surrounding reptiles and amphibians. Crump\u27s book is a collection of tales and myths both ancient and contemporary, and a fascinating analysis of how humans perceive and sometimes revere snakes, frogs and other loathsome creatures

LANDSAT/MMS propulsion module design. Volume 1: Task 4.3, trade studies

Evaluations are presented of alternative LANDSAT follow-on launch configurations to derive the propulsion requirements for the multimission modular spacecraft (MMS). Two basic types were analyzed including use of conventional launch vehicles and shuttle-supported missions. It was concluded that two sizes of modular hydrazine propulsion modules would provide the most cost-effective combination for future missions of this spacecraft. Conceptual designs of the selected propulsion modules were performed to the depth permitting determination of mass properties and estimated costs