ZOOLOGY AND BOTANYj MICROSCOPY, ETC. 595 



Moore, A. Y. — AmpMjyleura pellucida by central light. 



[Considers the real explanation of the resolution when the mirror is central 

 to be that the edge of the front cell of the objective radiates tlie light, and 

 all light reaching the bottom of the slide at a greater incidence than the 

 critical angle is reflected upwards, and enters the lens after having passed 

 through the diatom.] 



Tlie Microscope, III. (1883) pp. 49-51 (1 fig.). 

 Nelson, E. M. — On a quick-acting Adapter for Microscopical Objectives. 

 lAnte, p. 858.] 



Journ. Quel. Micr. Club, I. (1883) pp. 152-3. 

 „ „ New Nose-piece Adapter. \_Supra, p. 572.] 



Engl. Uech., XXXVH. (1883) pp. 333, 365, 385. 

 Ollaed, J. A. — Adapters for Microscopes. 



[Note on Nelson's and Curties', supra, p. 572.] 



Engl. Mech., XXXVII. (1883) p. 365. 

 Ottawa Microscopical Society. 



[Note on the formation of the Society and their offer of exphange of micro- 

 scopic material.] 

 Sci.-Gossip, 1883, p. 138, See also Amer. Mon. Micr. Journ., IV. (1883) p. 99. 

 [Pease's] " Facility " Nose-piece. [_Ante, p. 425.] 



Amer. Mon. Micr. Journ., IV. (1883) p. 103 (1 fig.). 

 Peeagallo, H. — Conside'rations ele'mentaires sur I'ouverture des objectifs micro- 

 scopiques et les moyens de la mesurer. (Elementary considerations on the 

 aperture of microscopic objectives and the methods of measuring it.) 



Journ. de Microgr., VII. (1883) pp. 326-36 (7 figs.), 

 from Bull. Soc. d'Hist. Nat. Toulouse. 

 Peado, p.— United States Patent for a Photo-micrographic Camera, No. 274515 

 18th October, 1882. [Title only.] 



Zeitschr. f. Insfrumentenk., III. (1883) Mai, "Wrapper, 

 " Prismatique." — Object-glass working, VI., VII. 



Engl. Mech., XXXVII. (1883) pp. 283 (1 fig.), 473-4. 

 Prisms v. Mirrors. 



[" It has long been an opinion among microscopists that the best and 

 strongest light for the illumination of microscopic objects is obtained by 

 substituting a prism for the ordinary mirror. The advantages offered by 

 the prism are more theoretical than practical, wlule tlie quantity of light 

 reflected by a silvered mirror is far greater than can be obtained from a 

 prism of equal size. The only advantage of the prism is the reflection 

 from the single plane surface, while the mirror gives a reflection from 

 both the outer and inner surfaces of the glass. But practically this is of 

 absolutely no consequence. A well-silvered mirror reflects 95 per cent, of 

 the light incident upon it. We will soon give a process for silvering glass 

 which yields perfect results and is readily applied by any person."] 



A7nei\ Mon. Micr. Journ., IV. (1883) p, 119. 

 [Queen & Co.'s] " Acme " No. 3 Improved [Microscope]. 



Amer. Mon. Micr. Journ., IV, (1883) pp. 110-1 (1 fig.). 

 Eespighi. — See G-ovi, 

 KiNDELEiscH. — [Impromptu Condenser. Supra, p. 574.] 



Berliner Elinische Wochenschrift, 1883, p. 183. 

 Eydee, J. A. — The Holman Lantern Microscope. [Supra, p. 552.] 



Journ. Franklin Institute, CXVI. (1883) pp. 67-9 (1 fig.). 

 ScHRENCK. — Exhibition (New York Microscopical Society) of a new form" of 

 Microscope-table. 



[" The particular feature of the table was a revolving centre upon which the 

 Microscope is intended to be placed."] 



Amer. Mon. Micr. Journ., IV. (1883) p. 100. 

 Smith, G. — Apparatus for Photomicrography. IPost.'] 



Amer' Mon. Micr. Journ., IV. (1883) p. 118. 

 from British Journal of Photography. 

 Stowell, 0. H. — Projecting Lanterns. \_Post.'] 



The Microscope, III. (1883) pp. 51-3. 



2 Q 2 



