910 SUMMARY or CURRENT RESEARCHES RELATING TO 



Internatioual Bureau of Weio;ht8 and Measures (conclcl). 



Nature, XXVIII. (1883) pp. 592-6 (2 figs.) from La Nature. 

 J., C. — The Microscopic Glasses. (A cliapter in advance.) 



[Describes tlie examination of the insectivorous i:)owers o^Drosera "about the 

 year 1900," with spectacles " of such a power as to enable the wearir at 

 a distance of a few feet to distinguish the minutest object as clearly as 

 with a first-rate Microscope."] 



ScL-Gossip, 1883, pp. 243-4. 

 Kelltcott, D. S. — The American Society of Microscopists. 

 [Account of the Chicago Meeting.] 



Amer. Mon. Micr. Journ., IV. (1883) pp. 172-4, 185-90. 



Tlie MicroscoiK, III. (1883) pp. 145-51, 160-1. 



Knafer, J. — Das Mikroskop und seine Anwendung. (The Microscope and its 



use.) Naturhistoriker, V. (1883) pp. 409-12. 



Koch. — Ueber eine Methode die Mikrometer-sehrauben zu priifen. (On a method 



of testiug micrometer-screws.) 



Ber. Verhandl. Naturf. Ges. Freihwg, VIII. (1882) Heft 1. 

 Lankesteb, E. R. — Piesidential Address to the Section of Biology at tlie South- 

 port IMeeting of the British Association for the Advancement of Science. 

 [Advocating the endowment of research, especially in Biology. Supra, 

 p. 907.] 

 Lasaulx, a. v. — Ein neues fiir petrographische und mineralogische Unter- 

 suchungen bestimmtes Mikroskop. (A new Microscope intended for petro- 

 graphical and uiineralogical researches.) 



[Made by Nachet under E. Bertrand's directions. Apparently the same as 

 ante, p. 413.] 



Verh. Naturhiit. Ver. Preuss. Rheinl. u. Westf., XXXIX. (1882) SB., p. 82. 

 LocKYER, J. N. — The Movements of the Earth. (In part.) 

 [Contains '• How Optics enables us to read fine verniers. 



„ „ ,. to replace the vernier by a micrometer."] 



Nature, XXVIII. (1883) pp. 598-G04 (17 figs.). 

 Mason, J. J. — Minute structure of the Central Nervous System of certain Reptiles 

 and Batrachians of America. Illustrated with 113 permanent photo-micro- 

 graphs. Series A, viii. and 32 pp. \_Post.'] 4to, Newport U.S.A., 1879-82. 

 Matthews, J. — Device for facilitating the exchange of objectives. 



\_Supra, p. 903.] Journ. Quek. Micr. Cluh, I. (1883) pp. 299, 305. 



Nelson, E. M. — New method of fixing objectives to the Microscope. 



lAnte, p. 572.] Journ. Quek. Micr. Cluh, I. (1883) pp. 298-300. 



NUNN, R. J. — The Pillar Slide. A new slide for the Microscope. \_Post.'] 



Sep. repr. from Trans. Med. Assoc. Georgia, 1883, pp. 21-2. 

 Amer. Mon. Micr. Journ., IV. (1883) p. 178. 

 „ „ Chemical. — New slide for the Microscope. \_Post.'] 



Sep. repr. from Trans. Med. Assoc. Georgia, 1883, pp. 22-4. 

 „ „ Slides with hollows for chemical reactions. [Post.'] 



Sep. repr. from Trans. Med. Assoc. Georgia, 1883, p. 24. 

 Officer, W. — Another reading table. 



[A piece of board covered on one side with American leather-clotli (for tables 

 with cloth covers), and on the other with green baize (for polished tables).] 



Sci.-Gossip, 1883, p. 232. 

 Ollard, J. A. — Zoophyte Troughs. 



[Directions for making.] Engl. Mech., XXXVIII. (1883) p. 224 (1 fig.). 



., W. G. — Doublets for the Microscope. 



[Deals with the reduction of spherical aberration with 2 lenses.] 



Engl. Mech., XXXVIII. (1883) p. 223. 

 PiPPET, W. A. — A substitute for a revolving table. 



[Cover of stout oil-cloth to a email table with a round top, drawn underneath 

 the table by strings like the mouth of a bag : the " cover will then revolve 

 witli tlie greatest ease even when it hus a considerable weight upon it "]. 



Sci.-Gossip, 1883, pp. 232-3. 



