INTRODUCTION OF THE MICROSCOPE 55 
scopic observation did not produce its great results until the 
nineteenth century, just after magnifying-lenses had been 
greatly improved. 
Robert Hooke (1635-1703), of London, published in 1665 
a book of observations with the microscope entitled Micro- 
graphia, which was embellished with eighty-three plates of 
figures. Hooke was a man of fine mental endowment, who 
had received a good scientific 
training at the University of 
Cambridge, but who lacked 
fixedness of purpose in the 
employment of his talents. 
He did good work in math- 
ematics, made many models 
for experimenting with flying 
machines, and claimed to have 
discovered gravitation before 
Fic. 12.--Hooke’s Microscope, 1665. 
From Carpenter’s The Microscope and Its Revelations. Permission of 
P. Blakiston’s Sons & Co, 
