The Microscope. 41 



15. Methods of manipulation, decantation, desiccation, isola- 

 tion, etc. 



16. Methods of measuring aperture, power, focal length, etc. 



17. Methods of illumination for special purposes, special objects, 

 etc. 



18. Uses of the Mechanical Finger. Application to research, etc. 



19. Electrical and thermal applications in research. Hot stages, 

 etc. 



20. Uses of Tin Boxes. Growing cells, compressoriums, troughs 

 and special apparatus for investigations of special objects, etc. 



21. Special methods of treatment or examination of special sub- 

 jects of investigation, such as Blood, Pus, Urine, etc., etc. 



22. Staining and mounting Bacteria, micrococci, etc., for exam- 

 ination. 



23. Special methods of cell-making, cementing, cover-cutting, etc. 



24. Special methods of mounting, labelling, finishing, packing, 

 storing or registering slides. Finder records, etc., etc. 



It is expected that one or more workers will illustrate each 

 of the above subjects. Many of the most efficient members of 

 the Society have already promised their co-operation. Sugges- 

 tions relating to the work in any respect are invited, and all 

 who are willing to aid in illustrating any of the above, or other 

 subjects not enumerated, are cordially requested to inform me 

 as soon as possible what part of the work they will undertake, 

 and communicate such information as may be needed in pre- 

 paring for the suitable presentation of their exhibits. 



C. M. Vorce, 

 164 Lake Street, Cleveland, Ohio. 



A MICROSCOPIC GEISSLER TUBE WITH FLUORES- 

 CENT SOLUTION. 



DR. ALLEN Y. MOORE, of Cleveland, has constructed a 

 microscopic Geissler tube about one fiftieth of an inch in 

 diameter and one-half inch in length. Platinum wires are sol- 

 dered into the ends, and the tube contains rarified air. Around 

 the tube is a fluorescent solution, and the whole is mounted in 

 a wooden slide 3 by 1 by f inches. It is the very latest and 

 handsomest production brought before the microscopical world. 



c. h. s. 



