Even before microorganisms were seen, some investigators suspected their existence and responsibility for disease. Amongm others, the Roman philosopher Lucretius (about 98-55 B.C.) and the physician Girolamo Fracastoro (1478-1553) suggested that disease was caused by invisible living creatures. The earliest microscopic observations appear to have been made between 1625 and 1630 on bees and weevils by the Italian Francesco Stelluti, using a microscope probably supplied by Galileo. However, the first person to observe and describe microorganisms accurately was the amateur microscopist Antony van Leeuwenhoek (1632-1723) of Delft, Holland.
Robert Hooke was the first scientist to describe cells seen through a microscope. He examined a piece of cork and described what he saw as little "rooms" or "cells" in the specimen.
The first one to have reported studying it was Anthoni van Leeuwenhoek in the 1670's.
D;Leeuwenhove
Microscope. A scientist might use a microscope. Well actually, it depends on the size of the animal. If it is microscopic, then scientists might have to observe it using it using a microscope. If it can actually be seen, then scientists mught actually take a sample of it back to the labratory to observe physically.
A compound light microscope. This is so because if any other were to be used, the organism would die or have to be dead first.
In 1864, Louis Pasteur, a French scientist, designed a flask that had a long curved neck to allow air, but not microorganisms, to enter the flask. To observe a small living organism, a scientist might use a compound light microscope.
Anton The_first_scientist_to_observe_living_cellsLeeuwenhoek
a microscope
A microscope.
Microscope. A scientist might use a microscope. Well actually, it depends on the size of the animal. If it is microscopic, then scientists might have to observe it using it using a microscope. If it can actually be seen, then scientists mught actually take a sample of it back to the labratory to observe physically.
A compound light microscope. This is so because if any other were to be used, the organism would die or have to be dead first.
A contrast or optical microscope.
A microscope ...
In 1864, Louis Pasteur, a French scientist, designed a flask that had a long curved neck to allow air, but not microorganisms, to enter the flask. To observe a small living organism, a scientist might use a compound light microscope.
living things
a compound light microscope
a microscope
Anton The_first_scientist_to_observe_living_cellsLeeuwenhoek
An electron microscope requires that the subject be dead to function. In order to receive a picture, the specimen must be coated in chemicals and put into a vacuum, a process which will kill any living specimen. A light microscope, although not as detailed, will allow the scientist to observe living specimens.
a microscope