BRIEF HISTORICAL SUMMARY 



2. 



679 



Projection Microscope 



As pointed out in the text (p. 221), the projection microscope is only a magic 

 lantern with a relatively short focus projection objective. The screen image is 

 therefore correspondingly larger than with the magic lantern. 



The first magic lantern described (1665) was recognized as a kind of micro- 

 scope by Milliet de Chales, for he says in the description: "microscopium 



FIG. 407. CHRISTOPHORO SCHEINER, 1573-1650. 



Astronomer and Inventor 

 (From the biography by Anton von Braunmuehl, 1891) 



Projection Apparatus for Drawing Sun Spots. Demonstrated the Retinal 

 Image. Said the Crystalline Lens of the Eye is Equal to Many Glass Lenses. 

 Invented the Pantograph. 



habes in hujusmodi machina," vol. ii, p. 667. A few years later (1685), Zahn 

 in his work on all kinds of optical instruments (Oculus Artificialis) , says on p. 

 255, "Lucerna magica est species microscopii." Both also point out that this 

 kind of a microscope is preferable to the ordinary one as many can see at the 

 s ame time. 



