97 
Maries 
Carried over 
c) Sufficient for photography (long exposures being re<iuired 
for high amplifications): 
Lamp -light. 
Argand burner with adjusted air-inlet (microscope lamp No. 59 
without water globe) 
Auer's incandescent gas-light will also be found to yield a 
good illumination ; its successful application implies, however, some 
experience. 
35. 
11. Large Photo-micrographic Camera. 
Mounted on two cast-iron standards on a level with the pro- 
jection apparatus. The camera, which is mounted upon a light 
iron frame slides backwards and forwards as a whole. Greatest 
length of bellows 1.5 m (3' 9") ; this length may be shortened to 
any desired degree. The bellows consist of two parts. The part 
nearest the microscope may be fixed in a vertical or any other 
intermediate position ; front and back of this part may be moved 
independently of each other by means of rack and pinion. The 
dark slides, which fit both parts of the bellows, are made to take 
plates 24X24 cm (9X9'0 and can be supplied with frames for 
smaller sizes. 
Price ofthe camera, inch ground and unground focussing- 
plate, double dark-slide 
Movable dark-slide for making exposure-scales. The sensitive 
plate is arranged to slide behind a slit cut in a fixed screen and 
upon it a series of narrow strips of the central portion of the 
object may successively be photographed with varying exposures 
Achromatic focussing lens mounted in tripod 
195.- 
25. 
18. 
Total 
Separate double dark-slides, each 20. 
Frames for plates for any standard or orther size, each . . 1.50 
