Thomas J. Allen

Jeffrey Glassberg's acclaimed Butterflies through Binoculars guides have revolutionized the way we view butterflies. Now there's a field guide in the same practical format, and with the same emphasis on conservation, to identify caterpillars. Caterpillars are as varied, fascinating, and often as colorful as the adult butterflies they become. This is the most comprehensive guide to these creatures available. It contains all the information necessary to find and identify the caterpillars of North America--from Two-tailed Swallowtails, some of the largest butterfly caterpillars at just over two inches when fully grown, to tiny Western Pygmy-Blues. Caterpillar seekers will learn how to distinguish between butterfly caterpillars and moth caterpillars, where and how to find caterpillars, and the visual differences between young and older caterpillars. Each species section describes how to identify the caterpillar, complete with brilliant photos--many published here for the first time. To make for easy field use, each caterpillar's key physical features, abundance, habitat, and major hostplants are listed on the same page as its photo. The book also contains a special section on butterfly gardening, offering valuable information on how to set up a butterfly garden and raise healthy butterfly caterpillars, and provides a thorough list of the plants butterflies most like to feast on. From the concerned gardener who wishes not to kill caterpillars that may one day become beautiful butterflies to the serious butterflier wishing to take the hobby to the next level, this remarkable guide will provide all of the information necessary for an enriching caterpillar experience.

The original edition of this book summarized more than a decade of work on communications flow in science and engineering organizations, showing how human and organizational systems could be restructured to bring about improved productivity and better person-to-person contact. While many studies have been done since then, few of them invalidate the general conclusions and recommendations Allen offers. In a new preface he points out - new developments, noting areas that need some modification, elaboration, or extension, and directing readers to the appropriate journal articles where the findings, are reported. The first three chapters provide an overview of the communication system in technology, present the author's research methods, and describe differences in the career paths and goals of engineers and scientists that cause special problems for organizations. The book then discusses how technological information is acquired by the R & D organization, shows how critical technical communication within the laboratory is for R & D performance, and originates the idea of the "gatekeeper," the person who links his or her organization to the world at large. Concluding chapters take up the influence of formal and informal organization and of architecture and office layouts on communication. Many of these ideas have been successfully incorporated by architects and managers in the design of new R & D facilities and complexes.