ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 



295 



KosENBuscH, H. — Microscopical Physiology of tlie Eock-making Minerals: an 

 aid to the microscopical study of Eocks. Translated and abridged for use in 

 schools and colleges by J. P. Iddings. 



XV. and 333 pp., 121 figs, and 26 photomicr., 

 8vo, London and New York [1888]. 

 RoYSTON-PiGOTT, Gr. W. — Microscopical Advancos. XLIV. 



[Apochromatic results. Kefractions in jet-black margins and attenuated lines 

 of light.] 



Engl. Mech., XLIX. (1889) p. 21 (5 figs.). 

 "W. — Die wissenschaftlichen Instrumente und Apparate auf der diesjahrigen Natur- 

 forscher-Versammlung zu Koln. (The scientific instruments and apparatus at 

 the Cologne Naturalists' Meeting of 1888.) 



[Microscopes, microtomes, photomicrographic apparatus, &c.] 



Zeitschr. f. Instrumentenk., VIII. (1888) pp. 430-5. 

 Welfoed, W. D., and H. Stuemey. — The "Indispensable Handbook" to the 

 Optical Lantern : a Complete Cyclopaedia on the subject of Optical Lanterns, Slides, 

 and Accessory Apparatus. 

 [Contains Lantern Microscopes and microscopic attachments.] 



370 pp., figs, and 1 pi., 8vo, London, 1888. 

 Zeiss, C, Obituary Notice of. Zeitschr. f. Instrumentenk., IX. (1889) pp. 36-8. 



Fig. 55. 



j3. Technique.* 

 CI) Collecting- Objects, includingr Culture Processes. 



Improved Form of the " Wright " Collecting Bottle.t— The bottle 

 I now use, says Dr. H. N. Lyon, is made of an ordinary metal-top fruit 

 jar (fig. 55). In the cover are two holes. 

 In one is soldered a funnel for the en- 

 trance of the water. la the other is a 

 tube about half an inch in diameter. 

 This tube reaches half-way to the bottom 

 of the bottle on the inside, and extends 

 far enough above the cover for a piece of 

 rubber tubing to be firmly fastened to it. 

 Surrounding the tube is a square frame 

 reaching almost to the bottom of the 

 bottle, made of four brass rods. This is 

 covered for three-quarters of an inch at 

 the upper end by a brass ferrule soldered 

 to the rods and to the cover. 



The strainer, which is of fine muslin, 

 is made like a long narrow bag, and is 

 drawn over the frame and secured by 

 a thread passing round the ferrule. A 

 rubber tube is attached to the outer end 

 of the central brass tube, and a spiral 

 spring is slipped over it to keep it from 

 bending too short. This tube reaches 

 about an inch below the bottom of the 

 inner tube, and serves as a siphon to 

 draw off the surplus water. It is self- 

 acting, starting when the water in the 

 funnel reaches the level of the highest 



* This subdivision contains (1) Collecting Objects, including Culture Pro- 

 cesses; (2) Preparing Objects; (3) Cutting, including Imbedding and Microtomes; 

 (4) Staining and Injecting; (5) Mounting, including slides, preservative fluids, &c. ; 

 (6) Miscellaneous. t Queen's Micr, Bull., v. (1888) p. 33 (1 fig.). 



