238 



SUMMARY OF CURRENT RESEARCHES RELATING TO 



MICROSCOPY. 



A. Instruments, Accessories, etc.* 

 Cl) Stands. 



Bausch and Lomb's Stand D D H.|— This Microscope (fig. 41) is 

 the largest of the makers' series, and is intended for the highest class of 

 work, its equipment being designed to make it well suited to research 

 and all lines of precise investigation. The body-tube is made of suffi- 



Fig. 41. 



cient size to permit the use of a 72 mm. Micro-Tessar, with the full 

 angle of view which that lens embraces. In the construction of the 

 instrument the prime consideration has been the excellence and complete- 

 ness of the finished product, and, while this policy adds to the cost, the 

 resulting instrument is meant to be of a quality likely to be appreciated 

 by those workers who require the best. The limb is fully inclinable, 

 and the arm, large and very strong, is arranged so as to leave a distance 

 of 75 mm. to the centre of the stage. The stage is circular, measuring 



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

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

 Optics aDd Manipulation ; (6) Miscellaneous. 



t Bausch andLomb, Rochester, N.Y., Catalogue, Microscopes and Accessories. 



