My Microscope and Some Objects from My Cabinet: A Simple Introduction to the Study of 'the Infinitely Little' (Classic Reprint)

Excerpt from My Microscope and Some Objects From My Cabinet: A Simple Introduction to the Study of 'the Infinitely Little' My microscope is what is called a portable one, and is monocular; that is, has but one tube, and is used by only one eye at a time. It has a tripod stand, which is perfectly steady in any position, with the usual gauge fitting for accessories under the circular glass stage, three eye-pieces of varying powers (the two higher ones I rarely use), and several object glasses, say 2 inches, magnifying 20 diameters; I inch, 50 diameters; inch, 100 diameters: and inch, 250 diameters. To these, when necessary, I can add a fl; water immersion lens, which will give an amplification of 480 diameters - all calculated as used with the lowest eye-piece. The mirror on its double-jointed arm will give us plenty of light in our field of view for all transparent objects as seen with powers up to the 5 inch, but for higher ones some little help is often required; and here my advice to the tyro who intends to purchase an instrument is to do as I have when obtain ing this one, and buy a spot lens of wide angle. This little piece of apparatus will not merely provide him a good black ground with his low powers, but will, when using the i or inch, act as a condenser, and give him not only a well-lit field, but also oblique light for resolution of test objects, with a little prae tice, which is as necessary in this department of science as in any other. So much for our optical means. The accessories are few and simple. A small bull's-eye condenser for illuminating opaque objects; a polariscope; a live box; a live trough, with glass sides for showing pond life, and a few glass slips and wooden slides will complete our equipment. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.