2O THE A B C OF PHOTO - MICROGRAPHY 



attached, with a second short board beneath 

 it of proper thickness to raise it to the height 

 of microscope. This in turn was placed in 

 front of the camera so that its optical axis 

 coincided with the center of ground -glass 

 focusing screen, and securely clamped to the 

 board or platform. The radiant a Wels- 

 bach incandescent mantle, mounted on a low 

 stand, so that it could be freely moved about, 

 was then placed some six inches from the 

 substage condenser and a home-made stand 

 with holder carrying a color-screen inserted 

 between the two. A sheet-iron box, open at 

 top and bottom, with glass front, was slipped 

 over the burner in order to prevent the dis- 

 semination of superfluous light in the room. 

 I thus had, after a few minutes' work, a really 

 practical arrangement of microscope and cam- 

 era capable of turning out quite excellent 

 photo-micrographs under a considerable range 

 of amplification. Reference to the illustration 

 (Fig. i) will make the details of this arrange- 

 ment quite clear. Modifications of it may, of 

 course, be made to suit all circumstances, but 

 the general ideas governing them are identical. 

 These comprise presuming of course pos- 

 session of the necessary microscope and camera 

 the arranging of them for working together 



