732 SUMMARY OF CURRENT RESEARCHES, ETC. 



Potato, Rush, and Vegetable Ivory, Preparing. 



[Partially desiccate, either by immersion in methylated spirit for a few 

 days, or by exposure to the air. Seetions may bo readily obtained by 

 imbedding and cutting in paraffin. Such sections mounted in balsam 

 are very beautiful, the starch being seen in situ, whilst if polarized light 

 bo employed, each granule gives its characteristic black cross. 

 After prolonged soaking in cold water, may readily be cut in the micro- 

 ti 'mo. The sections should bo mounted unstained in balsam, and though 

 not usually regarded as polariscopic objects, nevertheless, when examined 

 with the seleuitc, yield very fine colours]. 



The Microscope, V. (1885) p. 215. 

 Pringsheim, N— Ueber die Sauerstoflf-abgabe der Pflanzen im Mikrospectrum. 

 (On the excretion of oxygen by plants in the microspectrum.) [/ W.] 



Ber. Deutsch. But. GeseL, III. (1880) Qeneralversamml. pp. lxxii.-lxxx. 

 Rinnbock's Slides of arranged Diatoms. 



[Physician has ordered him to do no microscopical work for a year, "but I 

 fear that is for ever."] 



The Microscope, VI. (1886) p. 134. 



Rohkbeck, H. — Trocken-apparat fur Laboratorien mit Ventilation. (Laboratory 



drying apparatus with ventilation.) [Post.'} Chem.-Ztg., 1885, No. 21. 



Bot. Centralhl, XXVI. (1886) pp. 313-5. 

 Rollett, A.— TJntersuchungen iiber dem Bau der quergestreiften Muskel- 

 fasern. (Researches on the structure of the striated muscle fibres.) II. 

 [Methods, post.} 



Denhschr. Akad. Wiss. Wien, LI. (1885) 48 pp. and 4 pis. 

 Rouffart, E. — See Francotte, P. 



S e g u i n. — Anilinblauschwarz als Tinctionsmittel fur Hirnschnitte. (Anilin-blue- 

 black as a staining medium for brain sections.) 



Schu-clzer Correspondenzblatt, XIV. (1884) p. 45. 

 Selenka, E. — Metallmodelle nach mikroskopischen Praparaten. (Metal models 

 of microscopical preparations.) -Si?. Phys.-Mcd. Soc. Erlangcn, 1886, 3 pp. 



Seymour's (M. L.) Injecting Apparatus. 



[A column of mercury can be set at various heights in a slotted tube and 

 delivers mercury to a jar partly filled with water, forcing the air into 

 a second jar with the injecting solution. An Ashcroft pressure gauge is 

 connected with the latter.] 



St. Louis Med. and Surg. Journ., L. (1886) pp. 237-9 (1 fig.). 

 Sharp, B. — Fermentation in Perenyi's Fluid. \_Post.~] 



Proc. Acad. Nat. Sci. Philad., 1886, p. 61. 

 Slack, H. J. — Pleasant Hours with the Microscope. 



[Mouth-organs of Rotifers.] Knov: ledge, IX. (1886) pp. 246-7 (4 figs.). 



Streng, A. — Ueber eine neue Mikroskopisch-chemische Reaction auf Natrium. 

 (On a new micro-chemical reaction for sodium.) 



Ber. Oberhess. Gcsell. f. Natur- u. Heilk. G lessen, XXIV. (18S5) pp. 56-8. 

 „ „ Mikroskopisch-chemische Bestimmung von Kobalt und Nickel. 

 (Micro-chemical determination of cobalt and nickel.) Ibid., pp. 56-8. 



Vries, H. de. — Over het algemeen voorkomen van circulatie en rotatie in de 

 weefselcellen der planten. 



[Movements of protoplasm in tissue-cells.] [Methods, supra, p. 266.] 



Maandbl. voor Natuurw., 1884. See Bot. Ccntralbl, XXIV. (1885) p. 79. 

 W., E. W — Cement for Micro Work. 



[" This cement I have found unfailing in micro work under a finishing var- 

 nish :— Gold size, 2 oz. ; white lead, 1/2 oz. ; red lead, 1/4 oz. ; patent dryers, 

 1 dram. Grind the white lead, red lead, and dryers very fine, then add 

 the gold size, which must be the very best and old."] 



Scicntif. Ewpilrer, I. (1886) p. 112. 

 Wagner, F. v.— Das Nervensystem von Myzostoma. (The nervous system of 

 Myzostoma.) [Methods, post.] 52 pp., 1 pi. (8vo, Graz, 1886). 



Wieger, G. — See Born, 0. 



