Optical Measuring Instruments

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. The present book makes no pretence of instructing the Optical scientific instrument maker in his own work, but since it presents some Of the views of the user of instruments, and since it covers a range of instruments wider than the production of most factories, it may prove of some interest to commercial firms. NO user of a tool can study it too thoroughly, and he will learn a lesson of no little value if he realizes that, in the use of an Optical instrument, the eye and, in fact, the whole mind and body are equally concerned in obtaining the required results. The author will feel amply repaid, however, if it should prove that the book appeals to teachers of science. Are there not many parts of typical physics courses which could with advantage be replaced by more modern material which, while equally educational, is more likely to find direct application in practice? The study of instruments yields such material in abundance.