ABSTRACTDiffraction gratings are famously associated with Henry Rowland of Johns Hopkins University but there were precursors. Although gratings were first made and used in Europe, reliable machines for ruling gratings were developed in the USA, and two men, Lewis Rutherfurd and William Rogers, tackled the problem before Rowland. Rutherfurd, a wealthy independent astronomer, designed and built the first screw-operated engine for ruling diffraction gratings, the fore-runner of almost all subsequent ruling engines. With it he and his assistant D. (...) C. Chapman ruled many gratings which he generously distributed to practising scientists, thereby materially advancing the science of spectroscopy. Rogers was a Harvard astronomer who developed an interest in the ruling of fine lines on glass that led him to construct a ruling engine with which he investigated the causes of the errors in the rulings he had examined. He continued to seek improvements with a second engine designed for ruling diffraction gratings. He ceased developing this engine when Rowland’s excellent gratings began to be available, concentrating instead on related problems to which he could apply the knowledge and skills he had gained, but his investigations assisted Rowland and other later ruling engine builders. This paper brings together what is known about the ruling engines of Rutherfurd and Rogers, their development, the gratings they produced, their quality and the work that was done with them, and assesses and compares their achievements and the impacts of the work of these two men. (shrink)

Scientific uncertainty puzzles many people. The puzzlement arises when scientists have more than one answer, and disagree among themselves. This book helps people find their way through this maze of scientific contradiction and uncertainty. By acquainting them with the ways that uncertainty arises in science, how scientists accommodate and make use of uncertainty, and how they reach conclusions in the face of uncertainty, the book enables readers to confidently evaluate uncertainty from their own perspectives, in terms of their own experiences.

Mors Hamilcaris peropportuna et pueritia Hannibalis distulerunt bellum. Medius Hasdrubal inter patrem ac filium octo ferme annos imperium obtinuit, flore aetatis, uti ferunt, primo Hamilcari conciliatus, gener inde ob aliam indolem profecto animi adscitus et, quia gener erat, factionis Barcinae opibus, quae apud milites plebemque plus quam modicae erant, haud sane uoluntate principum, in imperio positus.

The recent exchange between Glenn Yago and James W. Brock over the junk?bond buyouts of the 1980s missed the mark on a number of points. In reality, neither the buyouts nor their sudden near?cessation contributed materially to the recession of 1990?91. The buyout wave did not end primarily because of new restrictive regulations. The buyouts had no appreciable effect on real capital formation. And the increased rate of bankruptcies resulting from the buyouts left the economy's overall efficiency unimpaired.

A corrected and extensively annotated version of the sole meeting between two of the most important figures in twentieth-century intellectual life.

The universality, invariance, and elegance of principles governing the universe may be reflected in principles of the minds that have evolved in that universe – provided that the mental principles are formulated with respect to the abstract spaces appropriate for the representation of biologically significant objects and their properties. (1) Positions and motions of objects conserve their shapes in the geometrically fullest and simplest way when represented as points and connecting geodesic paths in the six-dimensional manifold jointly determined by the (...) Euclidean group of three-dimensional space and the symmetry group of each object. (2) Colors of objects attain constancy when represented as points in a three-dimensional vector space in which each variation in natural illumination is canceled by application of its inverse from the three-dimensional linear group of terrestrial transformations of the invariant solar source. (3) Kinds of objects support optimal generalization and categorization when represented, in an evolutionarily-shaped space of possible objects, as connected regions with associated weights determined by Bayesian revision of maximum-entropy priors. Key Words: apparent motion; Bayesian inference; cognition; color constancy; generalization; mental rotation; perception; psychological laws; psychological space; universal laws. (shrink)

Published in 1897, this was the first complete edition of Roger Bacon's influential thirteenth-century encyclopedia of science.

The earliest Analects yet discovered, this work provides us with a new perspective on the central canonical text that has defined Chinese culture--and clearly illuminates the spirit and values of Confucius.

Embryos, cells, genes, and organisms : reflections on the history of evolutionary developmental biology / Manfred D. Laubichler and Jane Maienschein The organismic systems approach : streamlining the naturalistic agenda / Werner Callebaut, Gerd B. Müller, and Stuart A. Newman Complex traits : genetics, development, and evolution / H. Frederik Nijhout Functional and developmental constraints on life-cycle evolution : an attempt on the architecture of constraints / Gerhard Schlosser Legacies of adaptive development / Roger Sansom Evo-devo meets the mind : (...) toward a developmental evolutionary psychology / Paul E. Griffiths Reproducing entrenchments to scaffold culture : the central role of development in cultural evolution / William C. Wimsatt and James R. Griesemer. (shrink)

This book collects some of the most exciting pioneering work in perceptual and cognitive psychology. The authors' quantitative approach to the study of mental images and their representation is clearly depicted in this invaluable volume of research which presents, interprets, evaluates, and extends their work. The selections are preceded by a thorough review of the history of their experiments, and all of the articles have been updated with reviews of the current literature. The book's first part focuses on mental rotation; (...) the second includes other, more complex transformations and sequences of transformations. A third part describes work on rotational transformations in the context of the perceptual illusion of &"apparent motion.&" Roger N. Shepard is Professor of Psychology, Stanford University. Lynn A. Cooper is Professor of Psychology, University of Arizona. A Bradford Book. (shrink)

A deferred prosecution agreement, or DPA, allows a corporation, instead of proceeding to trial on a criminal charge, to settle matters with the state by acknowledging the facts on which any charge would be based, pay a reduced fine, and agree to change the way they conduct business. Critics of DPAs have suggested that, because the defendant corporation must pay a fine and submit to structural reform without having been found guilty at trial, DPAs violate the Presumption of Innocence. This (...) paper argues that they do not. The paper appeals to the role of civic trust in a liberal political community. The obligations a corporation assumes in a DPA can be framed as a reasonable retributive response to a breach by that corporation of the community’s laws, and an appropriate reassurance by that corporation to the community that such breaches will not reoccur. This framing is sufficient to deny that DPAs violate the Presumption of Innocence. (shrink)