Abstract
THIS was the subject chosen by Mr. A. E. Bingham for the address with which, as chairman, he opened the session of the Junior Institution of Engineers on October 9. After explaining the lens system of the modern instrument, he gave a resume of its history and evolution to its present capacity for the production of photomicrographs of metallic surfaces with great clearness at high magnifications. In the majority of engineering investigations, the specimens under examination are opaque, and the difficulties of illumination and the most advantageous methods to use were discussed, as also were the preparation of metallic specimens and the making of photomicrographs. The petrological microscope, as used for the magnification of rock sections of less than one thousandth of an inch in thickness, and for their examination under polarized light, was also introduced. Many examples of tlae applications of microscopy were given, among them the examination and measurement of particles of abrasive powders, determination of the lengths of fibres used in the paper, artificial silk and other industries, checking the results of heat treatment of steel, hardness testing, and the examination of profiles of screws, wheel teeth, and small products by means of the profile projector.
Article PDF
Rights and permissions
About this article
Cite this article
The Microscope in Engineering and Industry . Nature 138, 715 (1936). https://doi.org/10.1038/138715d0
Issue Date:
DOI: https://doi.org/10.1038/138715d0