Figure 1: Basic compound microscope: Light from a source is focused onto the sample (object) using a mirror and condenser lens. Light from the sample is collected by an objective, forming an ...

Which compound microscope is best? Anybody who is into science has probably thought about getting a microscope. But with so many different types available, it can be overwhelming to decide on the ...

Table of metric and English measures and table of natural sines on lining-papers. siris_sil_115192 ...

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 ...