94 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



MICROSCOPY. 



A. Instruments, Accessories, &c* 

 (ir?Stands. 



Beck's New Portable Dissecting Microscope/)* — This dissecting 

 Microscope is made in a portable form, with all the necessary apparatus 

 packed into the thickness of the wood, so that when folded there are no 



projections or loose pieces. The size when folded is 9 by 3f by 1| in. 

 Fig. 1 shows the instrument ready for use, and fig. 2 how it is hinged 

 and folded back when not in use. The table has a circular aperture for 

 the reception of a white porcelain saucer or a piece of transparent glass. 



Fig. 2. 



The lens carrier consists of a tube which fits into a socket in the table. 

 It has a double arm at the end of which the lens is fitted. At the lower 

 end of this is a lever, which forms a focusing adjustment. 



* This subdivision contains (1) Stands ; (2) Bye-pieces and Objectives ; (3) 

 Illuminating and other Apparatus ; (4) Photomicrography ; (5) Microscopical 

 Optics and Manipulation ; (6) Miscellaneous. 



t R. and J. Beck's Special Catalogue, 1905. 



