152 SUMMARY OF CURBENT RESEARCHES RELATING TO 



KoYSTON-PiGOTT, G. W. — Microscopical Advances, Ancient and Modern, 11. , 

 III., IV. 



[Advancing angular aperture. The definition of lines, points, and spherules. 



Kefracting spherules or molecules, black dots, test rings, and lines. 



Post.'] 



Engl. Mech., XLII. (1885) pp. 291-2 (2 figs.), 331-2 (14 figs.), 417-8 (6 figs.). 



Cf. also Engl. Mech., XLII. (1885) p. 277 (Lucernal Microscope). 



S., G. S. — Accessories for Microscopical Drawing. [_Supra, p. 137.] 



Sci.-Gvssip, 1886, p. 8 (2 figs.). 



Sebvup, H. — Die GescMchte des Fernrohrs bis auf die ueneste Zeit. (The 

 history of the Telescope to the most recent date.) 



[Contains references to the Microscope, and deals fully with achromatism.] 



vi. and 185 pp., 8 figs., 8vo, Berlin, 1886. 



Shaw, W. N.— See Glazebrook, E. T. 

 Smith's (H. L.) "Homo-tester." 

 [New illustration of it.] 



Micr. Bulletin, II. (1885) p. 43 (1 fig.). 



SoRET, J. L.— Appareil permettant I'observation microscopique des globules de 

 vapeur. (Apparatus for the microscopical observation of globules of vapour.) 

 [Post.] Arch. Sci. Phys. et Nat., XIV, (1885) pp. 575-6. 



S TOWEL L, C. H. — [Death of] Thad. S. Up de Graff. 



The Microscope, V. (1885) p. 229 



[Stowell, C. H. and L. E.]— Is it a Micro-photograph or a Photo-micrograph? 



The Microscope, V. (1885) pp. 208-9. 



„ „ Ayres' Micro-photographs. 



Ibid., p. 209. 

 „ „ „ Is it a Fraud ? 



[Comment on an editorial in the 'Cincinnati Medical News,' which 

 denounced as a fraud an offer of a Microscope and 1/2 in. and 1/6 in. 

 objectives for 22-50 dols.] 



The Microscope, V. (1885) pp. 231-2. 



„ „ „ See American Society of Microscopists. 



Stubbs, E. T. — Presidential Address to the Postal Microscopical Society. 

 [How best to carry on, advance, and improve the Society.] 



Journ. of Micr., V. (1886) pp. 1-9. 



Thompson, F. C. — An Easy Method of Making Micro-photographs. \_Post.'] 



Year-Book of Photography, 1886, pp. 49-52. 

 ViGNAL, W. — See Malassez, L. 



Wall, O. A. — [Pinhole Microscopes.] 



["The simplest Microscope is a piece of paper, or cardboard, which is 

 perforated with a pin. The pinhole is brought close to the eye, and 

 objects examined through it are considerably magnified. If the surface 

 of the card, or paper, is first blackened with ink, the image will appear 

 plainer and brighter. In the absence of tlie Coddington lens, this method 

 may serve to examine some of the superficial characters of drugs."] 



St. Louis National Druggist, VII. (1885) p. 281. 



„ „ On Photo-micrograph Cameras. 



[Walmsley's and Atwood's Cameras. " Buy no form of apparatus in which 

 the focussing plate is fixed in one immovable position," as it is easier to 

 make slight changes of focus by moving the ground glass than by moving 

 the objective. For enlargements also a movable plate is essential.] 



St. Louis National Druggist, VII. (1885) p. 320. 



, „ Druggists' Microscope. 



[Statement of some of the essential features advisable in an instrument 

 intended for actual work.] 



St. Louis National Druggist, VIII. (1886) p. 7, 



