Photography in Engineering

Abstract

IN his latest volume Mr. Tupholme has turned his attention to photography, and has collected and tabulated information from a very wide field in industry. The purpose of such a volume is to indicate to the busy engineer and executive what types of scientific apparatus have been developed for recording by photographic means the very considerable and important information required for industrial and technical processes. On the other hand, scientific workers, who are perforce working in narrow fields, often must have recourse to such a text in order to be prompted to devise their work in such a way that their results can be recorded with the desired degree of accuracy, and so be saved considerable time in devising recording methods of their own. There is no speculation in the present text, the information having been obtained from many sources, particularly British and American. The copying of prints, drawings and documents forms the first chapter, and it is evident that considerable progress has been made. Indeed, the old blue-print of industry has been almost entirely superseded by dyeline and photostatic methods. Of major importance is the very extensive use Of photographing the images of drawings on sensitized sheets of metal for subsequent drilling or shaping. In the laboratory there are many uses of photography ; the author outlines the regular methods of spectroscopy in rapid analysis, the use of polarized light, reflex photography on sections, and the general method of studying isochromatic lines arising from stresses in celluloid outlines of typical engineering sections.

Photography in Engineering

By C. H. S. Tupholme. Pp. xv + 276 + 188 plates. (London: Faber and Faber, Ltd., and the Hyperion Press, Ltd., 1945.) 42s. net.