728 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Monoyer, M. F. — Zur Theorie der Femrolire. Allgemeine Theorie centrirter 

 dioptrischer Systeme. (On the theory of the telescope. General theory of 

 centered dioptric systems.) {In part.) 



Centr.-Ztg. f. Optik u. Mech., VI. (1885) pp. 121-3, 133-6, abstracted by 

 G. Fischer from Seances de la Soc, Frang. de Phjsique, 1883, pp. 148-75. 

 Moo BE, A. Y. — The Microspectroscope. 



The Microscope, V. (1885) pp. 101-6 (3 figs, and 1 pL). 



Nelson, E. M. 



[Eeply to inquiry as to a condenser. Also statement that " the amount of 

 flint in an object-glass depends entirely on the formula by which it is 

 made, i. e. the idiosyncrasy of the maker."] 



Engl. Mech., XLI. (1885) p. 283, 

 „ „ Stop for an Ahbe Achromatic Condenser. 



[Not described.] 



Journ. Quek. Micr. Club., II. (1885) p. 148. 



„ „ Eotating Nose-piece Condenser, [Ante, p. 324 and p. 327.] 



Ihid., II. (1885) pp. 153-4. 



Queen, J. VV. — Remarks on using Oil-immersion Objectives. 

 [General instructions sent out with his 1/15 in. objective.] 



Micr. Bulletin (Queen's) II. (1885) p. 22. 

 Queen's {J. W. # Co.') New Class Microscope. \_Post.'] 



Proc. San Francisco Micr. Soc, 22nd April, 1885, 

 "EoB. Crus." — The Micro-objective. III., IV., V. 



Fngl. Mech., XLI. (1885) pp. 302 (3 figs.), 327-8, 413-4. 

 ScHEKEER, J. — Der Angehende Mikroskopiker, Oder das Mikroskop im Dienste 

 der Hohern Volks- und Mittelschule. (The young Microscopist, or the Micro- 

 scope in the higher, primary and middle schools.) 



XV. and 206 pp., 134 figs. 8vo, Speicher, 1885. . 



Schoolroom, Microscope in the. 



[" No person who has not made the trial can form an adequate conception 

 of the mental quickening occasioned by an exhibition of selected micro- 

 scopic objects to classes in the tchoolroom. Tlie scales on the butterfly's 

 wing, the hexagonal facets of the compound insect-eye, the transformation, 

 as it were, of seemingly shapeless grains of sand into structure of exquisite 

 beauty, the cyclosis of protoplasm in plant cells, and the movement of 

 blood-corpuscles in the foot of the frog — reaching the mind through the 

 eye, make and leave an impression, and give an understanding, which books 

 and diagrams are powerless to produce. The Microscope, frequently and 

 intelligently used, makes nature pellucid. There ought to be an excellent 

 one under skilful manipulation in every school."] 



Journ. N. York Micr. Soc, I. (1885) p. 110, 



ScHOTT. — TIeber optisches Glas. (On optical glass.) 

 [Title only.] 



SB. Jenaisch. Gesell. f. Med. u. Naturwiss. for 1884 (1885) p. 32. 

 Sol LAS, W, J. — On the Physical Characters of Calcareous and Siliceous Sponge- 

 spicules and other Structures. 



[Contains description of an arrangement for determining the density of 

 minute objects under the Microscope, Post^ 



Scientif. Proc R. DuUin Soc, 1885, pp. 374-92 (7 figs, and 1 pi.), 

 Stokes— Watson Spark Apparatus. [Vol. IV. (1884) p. 964.] 



Nature, XXXII. (1885) p. 208, 

 [S TO WELL, 0. H. and L. E.] — Long Papers v. Short Papers. 



[Advocates papers of not more than twenty minutes in length.] 



The Microscope, V. (1885) p. 136. 

 „ „ See Walmsley, W. H. 



Textile Microscopical Association. 



[" A National Textile Microscopical Association was formed last Saturday by 

 members of the Corresponding Societies of Boston and New York."] 



Science, V. (1885) p. 472. 



