WHEN public interest in the curiosities of science was widespread, some fifty years ago, the possession of a microscope was a social necessity. The instrument to-day is no longer the popular plaything ...
THE author of this convenient and systematic little treatise is Demonstrator of geology in the Imperial College of Science, London, where he has gained experience through the introduction of large I ...
Table of metric and English measures and table of natural sines on lining-papers. siris_sil_115192 ...
A microscope is a scientific instrument used to magnify small objects so they can be seen larger than life. The simplest microscope is a single lens called a magnifying glass. The larger, more ...
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