ERRORS OF THE PARALLEL-PLATE MICROMETER

Abstract

The last issue (No. 26) of the Review contained an article on “Observing with the Zeiss and Wild Theodolites”, making reference among other matters to the errors of the parallel-plate micrometer. The statement was made that the error was due to the difference in travel between the two plates. This is not strictly correct but could not be better expressed without additional explanation, out of place in an already overlong article.