424 SUMMARY OF CURRENT RESEARCHES RELATING TO 



ELmn, — .—Drawing Microscopic Objects. 



["Mr. Kain showed (at a meeting of the Camden Society) a method of 

 throwing the image downward by means of a convex mirror, and 

 receiving the magnified image upon a sheet of white paper placed upon 

 the table. It could then be traced without difficulty."] 



Avier. Mon. Micr. Joum., III. (1882) p. 59. 

 Kain, C. H. — Photo-micrography. 



Amer. Mon. Micr. Joum., III. (1882) pp. 71-2, 75. 

 LossNEE, O. W. — Telemikroskop (Telemicroscope). 



[Abstract of German patent for a combination of a Microscope and a 

 Telescope, D. R. P. 16672, 5th Apr. 1881.] 



Zeitschr. f. Instmmentenk., 11. (1882) p. 156. 

 Martens, A. — Instrumentenstativ mit Kugelgelenken und Klemmringen. 

 (Microscope-stand with ball joints and fastening rings.) 



Zeitschr.f. Instrumenten':., II. (1882) p. 112 (1 fig.). 

 Matthtessen, L. — Die mittleren Brechungsindices fester und fi^ii-siger Korper 

 im Vergleich mit ihrer Totaldispersion. (The mean refractive indices of solid 

 and fluid substauces in comparison with tlieir total dispi-rsious.) 



Ccntr.-Ztg. f. Opt. u. Med., III. (1882) pp. 73-4. 

 Microscope and Magic-lantern. 



[Remarks as to the best objectives by " Sunlight."] 



Engl. Mech., XXXV. (1882) p. 202. 

 MoRBisoN, — . — Drawing Microscopic Objects. 



[" Mr. Morrison showed (at a meeting of the Camden Society) an arrange- 

 ment on the plan of a camera-obscura by which the image was thrown 

 upwards upon a piece of transparent paper placed upon a plate of 

 plain glass."] Amer. Mon. Micr. Joum., III. (1882) p. 59. 



iMonnting Micro. Lenses. 



[Directions by " Prismatique," W. J. Lancaster, and " Micro."] 



Ewjl. Mcch., XXXV. (1882) pp. ISO, 199, 227. 

 Objectives and Eye-pieces, best method of determining focal length of. 



[Suggestion that Prof. Abbe should give a " short exposition of the 

 subject," with diagrams by Akakia.] ^^^^_ ^^^^^^ ^^^^ ^^^^^^ ^ 227. 



Objectives, Verification Department for. 



[Tabular results of measurements of objectives (con/J.).] 



North. Microsc-jpist, II. (1882) pp. 87, 107, 128-9. 

 Ollakd, J. A. — Microscopical Drawings. 



[Recommends as a simple camera lucida '• Forrest's Reflector," — a thin 



glass cover adjusted to the eye-piece.] Sci.-Hossip, 1882, p. 90. 



PiKKEENELLE, W. — Apparat zur Erleichterung der mikroskop. Untersuchung 



von Flussigkeiten. (Apparatus for facilitating the microscopical investigation of 



fluids.) German Patent, lYo. 18071, 31s< May, 1881. 



Postal Microscopical Society, History of. 



Joum. Post. Micr. Soc, I. (1882) pp. 4-7. 

 President's Adcbress (contd.). Engl. Mech., XXXV. (1882) pp. 213-5. 



Schroder, H. — Ueber Projections-Mikroskope. (On projection Microscopes.) 

 [Abstr. of original article, ante, p. 274.] 



Zeitschr. f, Instrumentenk., II. (1882) p. 71 (1 fig.). 

 Verekeb, J. G. P.— Numeiical Apertuie. 



Journ. Post. Micr. Soc, I. (1882) pp. 7-12 (5 figs.). 

 Wexham's Universal Inclining and Rotating Microscope. 



This Jounml, IL (1882) pp. 255-7 (4 figs, and 1 pi.). 



Engl. Mech., XXXV. (1882) pp. 143-5 (5 figs.). 



N'orth. Microscopist, II. (1882) pp. 108-10 (1 pi.). 



[Remarks by F.R.M.S., supplementing the previous description, and 



di aling with (1) general design, (2) fine adjustment, (3) stage, (4) 



diaphragms and substage centering motions.] 



Engl. Mech., XXXV. (1882) p. 195. 



[Claim by "Another F.R.M.S." that it is the invention of Dr. hdmunds, 



and replies by F. H. "Wenhara, Ross and Co., and J. M. Moss ; and 



further remarks by '-Another F.R.M.S.," " Yet Another F.R.M.S.," 



and "Akakia." Supra, p. 400.] 



Engl. .Mech., XXXV. (1882) pp. 217, 237, 260. and 261. 



