144 SUMMARY OF CUEKENT RESEARCHES RELATING TO 



Albeetotti, G., jun. — Sulla Micrometria, (On Micrometry.) IPostJ] 



Ann. di Ottalmologia, XI. (1882) pp. 29-30 (1 pi.). 

 Klin. Monatsbl. f. Augenheilkunde, 1882. 

 Anon. — The Wonders of Optics. 



[Inquiry for " a glass that I can see through paper or leather, and if you 

 have one please to be kind enough to send me the price of it at once " ; 

 and reply of editor, " Punch a hole in the paper or leather."] 



Micr. Bulletin, I. (1883) p. 7. 

 Barlow, T.— See ToUes, R. B. 



Bausch and Lomb Optical Co.'s new pattern " Investigator Improved " Microscope, 

 and 1/4 in. objective. 



[Coarse adjustment moves nearly 2 in. higher — pillar heavier and higher — 

 separable swinging tail-pieces — Objective with extra large working 

 distance.] 



The Microscope, III. (1883) p. 239. 

 Bell, J. S. B. — Warm Stage and Stage Condenser for Diatomacese. 



[Warm stage post. Stage condenser " simply an addition of a shutter 

 to the hemispherical lens .... similar to that used by Powell and 

 Lealand."] 



Micr. News, IV. (1884) pp. 19-20. 



Blackham, G. E. — The relation of aperture to amplification in the selection of a 

 series of Microscope Objectives. \_Post.'] 



Proc. Amer. Sac. Micr., 6th Ann. Meeting, pp. 33-41. 

 Discussion, pp. 227-31, 

 „ „ See also Tolles, E. B. 



Bbadbtjey, W. — The Achromatic Object-glass, XXIX. 



Engl. Mech., XXXVIII. (1883) pp. 258-9 (1 fig.). 



„ „ On Eye-pieces. „ „ (1884) pp. 401-2. 



Bulloch, W. H. — New Congress Nose-piece. Patented 1883. [_Supra, p. 118.] 



The Microscope, III. (1883) p. 218 (2 figs.). 

 Also U.S.A. Patent, No. 287904, of 23rd January, 1883. 

 C, J. A.— See Penny, W. G. 

 Caee, E. — Microscopic Test Objects. [_Supra, p. 138.] 



Engl. Mech., XXXVIII. (1883) p. 280. 

 Cohen, E., and Grimm, J. — Sammlung von Mikrophotographien zur Veran- 

 schaulichung der Mikroskopischen Structur von Mineralien und Gesteinen. 

 (Collection of micro-photographs for the demonstration of the microscopical 

 structure of minerals and rocks.) Parts IX. and X. (conclusion). 38 pp. 

 Plates 65-80. 4to, Stuttgart, 1883. 

 CoHN, F. — Bicentenary of Bacteria. 



[Calls attention to tlie fact that, in a letter dated 14th September, 1683, 

 A. van Leeuwenhoek gave notice to the Royal Society that with the aid 

 of his Microscope he had discovered in the white substance adiiering to 

 his teeth very little animals moving in a very lively fashion. " They 

 were the first bacteria the human eye ever saw." [See also " L.," infra.^ 



Nature, XXIX. (1883) p. 154. 

 Colt, J. B. — Determination of the Foci of Lenses. 



U.S.A. Patent, No. 288025, of 17th September, 1883. 

 Coombs, C. P. — Address as President of the Postal Microscopical Society, 

 11th October, 1883. 



[On " examining occasionally the food we eat or the clothes we wear."] 



Journ. of Microscopy, III. (1884) pp. 1-7. 



Cox, J. D. — A new form of Microscope -stand with concentric movements. ^Post.} 



Proc. Amer. Soc. Micr., 6th Ann. Meeting, pp. 147-8 (1 fig.)- 



Discussion, pp. 235-6. 

 D., E. T. — Graphic Microscopy. 



[Description of coloured lithograph of Tingis Crassiochari.] 



Sci.-Gossip, 1884, pp. 1-2 (1 pi.). 

 Darling, S.— Micrometer. U.S.A. Patent, No. 287420, of 1st March, 1883. 



