50 



PHOTO-MICROGRAPHY 



know well : it is excellent and in every way suited for practical work. Undoing the 

 central screw the whole microscope with the illuminant shifts round on a turntable, 

 which is of great service, supposing the operator has not searched his slide before 

 commencing operations. At any time, however, it is useful. A long focussing-rod and 

 camera (not all seen) complete the apparatus. It is shown in Fig. 19. 



The apparatus sold by the old and esteemed firm of P. & J. Beck, of Cornhill, is 

 given in Fig, 19a. As shown in the block it is arranged for low-power work, where 



the firm recommend the employment of an ingenious 

 oil-lamp which is a sj'yecialite and shown in Fig. 1 9b. 



Another arrangement varying again in detail is 

 shown in Fig. 20, originally suggested by perhaps one 

 of the oldest and most respected fellow- workers in the 

 subject — we refer to Mr. Pringle : it is made in a most 

 excellent manner by Messrs. Swift & Son, and those 

 who have employed it seem well satisfied. Being 

 designed by so practical a man, it is needless to say all 

 possible requirements of the photo-micrographer are 

 well looked after. 



The old-established firm of Boss & Co. also make 

 a small but well- constructed stand. It is unostentatious 

 and intended mostly for low-powers, being fitted for an 

 oil-lamp, although limelight may be used. It is shown in Fig. 21. 



Next we illustrate the form of apparatus sold by Messrs. Watson & Son, Fig. 22. 

 Any transaction with this firm is always accompanied by great courtesy and attention, 

 for the small wants of the beginner or novice are as attentively looked after as the 

 requirements of the specialist or expert. The apparatus is devoid of all superfluities, 

 which renders it, like that sold by Baker, of Holborn, very moderate in price. It is 

 provided too with a means (not over-well shown in the block) for rotating the 

 microscope and limelight without moving the camera. These manufacturers also sell 

 another stand suggested by Mr. Stringer, and a student's form. 



The last firm we mention is that of Zeiss : we gladly recommend them, for we 

 have never received otherwise than extreme attention and courtesy at their hands- 

 Their representatives in Margaret Street, Cavendish Square, are always willing to 

 afford every possible infoi-mation and take all the trouble they can in carrying out 



Fig. 19b 



