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SUMMARY OF CURRENT RESEARCHES RELATING TO 



MICROSCOPY. 



A. Instruments, 'Accessories, etc.* 

 (1) Stands. 



_ " Waterhouse " Museum Microscope. — This Microscope (fig. 121) 

 is [designed for the display of one dozen microscopic objects, in a 

 museum or exhibition, where it is required to leave the instrument 

 unattended and at the same time to prevent breakage or injury to 

 Microscope or objects. The instrument here illustrated is an improved 





Fig. 121. 



form of previous patterns. It consists of a dust-proof ebonised 

 mahogany-framed glass case, in which the Microscope is fitted. The 

 objects, twelve in number, mounted on the standard size of slips, 

 3 by 1 in., are placed upon a revolving brass drum of very solid con- 

 struction. The surfaces on which the objects rest are machine-planed, 

 thereby insuring proper focus being maintained when objects are 

 changed. The drum is rotated by means of a milled head from outside 

 the case, and fine focusing is effected by moving the projecting eye-piece 



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

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

 Optics and Manipulation ; (6) Miscellaneous. 



