Ohio History Journal

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THE EARLY USE OF THE MICROSCOPE IN OHIO

THE EARLY USE OF THE MICROSCOPE IN OHIO

 

By RUSSELL L. HADEN, M.D.

 

The compound microscope invented in 1590 made possible

the observation of a new world of minute things. The practical

application of this instrument, however, developed very slowly.

No field of science, for instance, has profited more from the rev-

elations of the microscope than medicine.  Bacteria, protozoa

and many animal parasites were observed by the early micro-

scopists, yet the microscope was not used generally in medicine or

even for the instruction of medical students until after a lapse

of nearly three hundred years.

While Galileo as early as 1610 observed with a microscope

the finer structures of certain insects, the serious early use of the

microscope in science began in 1665 with Robert Hooke's Micro-

graphia and was continued by Marcello Malpighi, Jan Swammer-

dam, Nehemiah Grew and Anton Van Leeuwenhoek. The class-

ical period of the microscope ended with Leeuwenhoek's death

in 1723. Many of the workers of this period were only random

observers. A few such as Swammerdam and Malpighi really

advanced knowledge.

Relatively few books on the microscope were written during

the eighteenth century, and very few improvements were made in

the mechanics of the microscope. The compound microscope re-

mained much as Hooke left it. Among the more important books

were Henry Baker's The Microscope Made Easy (1742) and Em-

ployment for the Microscope (1753), George Adams' Micro-

graphia Illustrata (1746) and Benjamin Martin's Micrographia

Nova (1742). These writers described the microscopes then in

use and certain observations made with them, but no serious at-

tempt was made to study nature systematically. Microscopy as

such may be said to have been in a state of stagnation. Often the

microscope was only a plaything or an object of amusement.

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