ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



407 



Winkers Demonstration Microscope with Detachable Toot.* — 

 This instrument is intended for use at lectures and demonstrations, 

 when it is desired to pass specimens illustrating the various points 

 dealt with from hand to hand. The sliding tube course-adjustment can 



Fig. 44. 



be clamped when desired. Fine-ad justmeni is effected by sliding the 

 eye-piece in or out of the tube, which is sprung for holding it in the 



desired position. 



Souza-Brandao, V. de— novo Microscopio da Commissao do Servico Geologico. 



Covim. . / tigal, v. (Lisbon, 1903) 



pp. 118-250 (2 pis.). 



* R. Winkel, Gottingen Catalogue, 1911, p. 44 (3 tigs.). 



