Synopses & Reviews
Synopsis
Excerpt from Manual of Human and Comparative Histology Histology, Vol. 3
The Science of Histology rests on more numerous and more exact Observations than any other department of knowledge. The microscope effects the enlargement of the image falling upon the retina, and by thus diminishing the extent of surface that can be examined at once, we gain proportionately in sharpness.
Constant practice enables us to raise the acuteness Of our perception of luminous rays to an extraordinary degree. We place ourselves in a convenient position; we put away from us all extraneous disturbing impressions on our senses, and even concentrate the sensation of light upon one eye. Nay, more, we even endeavour to save this organ every secondary or subsidiary effort, neither permitting it to roll nor allowing any accommodation to be effected. We take, so to speak, the eyeball into our very hands, we accommodate it by a screw, and turn it about by means of a mechanical stage.
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