ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



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necessary, and these were compared with the features of the more elal)orate 

 types of Microscopes. By simple photomicrography methods, the phil- 

 atelist can photograph any surface feature found in the various dies 

 used, and, of more importance still, can produce photomicrographs of 

 watermarks in postage-stamps. For the investigations of papers used for 

 making postage-stamps and in numerous other ways, the instrument will 

 be found useful. The Philatelic Microscope will be found to give a 

 range of 7 to 150 diameters for both visual and photographic work. 

 Primarily the Philatelic Microscope has been produced specially for 

 Philatelic work, but it can be used in many other branches of micro- 

 scopy with great success, especially in the examination of large sec- 



FiG. 39. — Philatelic Microscope, with ^Mirror removed, in position 

 for examination of water-marks or for photographic purpose?. 



tions and specimens. The height, when the body tube is racked down 

 to its lowest point, measures 9 in., and when fully extended measures 

 l'2h in. from the base of the box. The containing case measures 

 lOf X 4^ X 3J in. internally, and 11 x 5i x 4|^ in. externally. The 

 body-tube measures 6 in. long and in diameter just over 2 in., a wide 

 body-tube being; more suitable for Philatelic work. The liml) or arm 

 has been made specially long to allow for a long rackwork extension 

 when low power objectives are used. The foot comprises a conical peg 

 which fits into a cone-shaped slot, fixed on the side of the box; the base 

 of the limb is inclinable, which allows the instrument to he used in 

 almost any position, especially when used for photomicrography. The 

 mirror is of double form and can be removed out of its socket. The 

 coarse-adjustment is controlled by two large milled-head screws as found 

 in ordinary instruments, along with diagonal rackwork and pinion. 

 The stage, of large size, 4 in. square and plain type, fits into the limb 

 of the Microscope, and is held in position by means of a large screw. 



