PHYSICAL, CHEMICAL, ZOOLOGICAL, AND BOTANICAL WORKS. 



207 



('84). DE VRIES, HUGO. Over eene methode om in 

 planten-sappen gebonden zuren te befolen. 

 Maandblad voor Natuurwetensdiappen, No. 

 9, 1884. Rev. in Botan. Centralb., Bd. xxiv, 

 p. 249. 



This author gives a method of estimating the quantity 

 of acid in plants when not free, i.e., when united with 

 bases. 



('84). MOLL, J. W. Eene nieuwe mikrochemische 

 looizuurreactie. Maandblad voor Natuur- 

 wetenschappen, 1884. Rev. in Bot. Centralb. 

 Bd. xxiv, p. 250. 



Best method (micro-chemical) of detecting tannin in 

 cells. He soaks small pieces of tissue in saturated solu- 

 tion (7 per cent) acetate of copper 8-10 days, and longer 

 will not injure. Then they are sectioned and treated for 

 a few minutes with a drop of 0.5 per cent sol. iron ace- 

 tate. Too long an exposure browns the cell walls. The 

 sections are then washed in water, transferred to alcohol 

 and finally mounted in glycerine or glycerine jelly. If 

 the test cannot be made at once, the specimens will not 

 be injured by preserving in alcohol, after the soaking in 

 acetate of copper. The tannin-bearing cells become green 

 or blue. 



('85). HANAUSEK, T. P., AND PAMMER, L. Ueber 

 die Loslichkeitsverhaltnisse des Kautschuks. 

 Zeitschrift des allg.- 6'sterr. Apotheker- 

 Vereins, 1885, No. 31, pp. 486-488, with a 

 table. Rev. in Bot. Centralb.. Bd. xxv, 1886, 

 P. 308. 

 Note on best solvents for rubber. 



('85)- STRASBUKGER, ED. Zur mikroskopischen 

 Technik. Bot. Centralb., Bd. xxiv, 1885, 

 pp. 156-157- 



According to Strasburger, Faber's yellow pencils are 

 the best for writing on glass or porcelain. To find par- 

 ticular places in a preparation, be makes rings on the 

 stage of the microscope to each side of the opening, and, 

 when the desired field is in view, corresponding ones ou 

 the slide. The best method of making eau de Javelle is 

 said to be the following : 



(rt) Take 20 parts of 25 per cent chloride of lime (Chlor- 

 kalkes), stir up in 100 parts of water, and let stand for a 

 time. 



(6) Dissolve 15 parts of pure potash in 100 parts of 

 water. 



Add b to , and, after one to several days, filter and 

 use the filtrate, if lime still remains in the fluid, add a 

 few drops of potash solution and filter out precipitate. 



('85). LEHMANN, Q. Physikalische Technik. Spe- 

 cielle Anleitung zur Selbstanfertigung phy- 

 sikalischer Apparate. pp. XH, 416, with 882 

 wood cuts and 17 tables. Leipsic, Wm. 

 Engelmann, 1885. 



('85). NOLL, F. Eau de Javelle, ein Aufhellungs- 

 und Losttngsmittel fur Plasma. Botan. 

 Centralb., Bd. xxi, 1885, pp. 377-380. 

 Author tells how to make and how to use ean de Javelle. 

 Alcoholic material is best suited for treatment. Fresh 

 protoplasm does not dissolve completely, but leaves 

 detritus and granules. Strasburger, Ibid., Band xxiv, 

 p. 157, says this is not eau de Javelle. 



('85). KRAUS, C. Ueber amphotere Reaction der 

 Pflanzen-Safte. Botan. Centralb., Bd. xxiv, 

 1885, p. 287. 



A. Meyer summarizes some of Kraus' results obtained 

 from the pith parenchyma of twenty plants. Kraus 

 claims that neutral litmus would not answer. He used 

 red and blue litmus. Little pieces were thrown into 

 the sap and left a long time. He got both reactions. 



('86). PFEFFER, W. Ueber Aufnahme von Anilin- 

 farben in lebende Zellen. Untersuchungen 

 a. d. Bot. Inst. zu Tuebingen, Leipzig, 1886, 

 Bd. n, Heft 2, pp. 179-329. 



('86). BACH MANN, E. Spektroscopische Untcr- 

 suchugen von Pilzfarbstoffen. Plauen, 1886. 

 Not seen. 



('86). SHENSTONE, W. A. The methods of glass 

 blowing for the use of physical and chemical 

 students, pp. x, 86, with figures. I2mo. 

 Rivingston's, Waterloo Place, London, 1886. 



('89). BEHRENS, W., KOSSEL, A., UND SCHIEFFER- 

 DECKER, P. Das Mikroskop und die Metho- 

 den der mikroskopischen Untersuchungen. 

 pp. vm, 315, with 193 wood cuts. Braun- 

 schweig, Harald Bruhn, 1889. 



('90). CURTMAN, CHARLES O. Chemical reagents and 

 the spectroscope. I2mo. pp. 256, with 12 

 plates. John L. Boland Book and Stationery 

 Co., St. Louis, 1890. 

 A useful little book. 



('90). NICKEL, EMIL. Die Farbenreactionen der 

 Kohlenstoffverbindungen. 2d ed. pp. VIH, 

 134. Berlin, Verlag von Hermann Peters, 

 1890. 



('9i-'92). OSTWALD, WILHELM. Lehrbuch der allge- 



meinen Chemie. Zweite ganzlich umgear- 



beitete A-uftage. Leipzig, 1891-1892. 2 Bd. 



The fourth book of the second edition was translated 



into English by M. M. Pattison Muir, under the title 



" Solutions." London, 1891, pp. xiii, 316, 8 vo. 



('92). TRIMBLE, HENRY. The tannins, pp. 168. J. 

 B. Lippincott Co., Philadelphia, 1892. 



('92). ZIMMERMANN, A. Die batanische Mikrpteoh- 

 nik. Ein Handbuch der Mikroskopischen 

 Preparations- Reaktions- und Tinktions- 

 methoden. Mit 63 Abbild. im Text. Tubin- 

 gen, 1892. pp. x, 278. English translation by 

 James Ellis Humphrey. Henry Holt & Co., 

 New York, 1893. 



('93). LEA, A. SHERIDAN. The chemical basis of the 

 animal body. New York, Macmillan & Co., 

 1893. pp. 288. Forms Part v of 6th ed. of 

 Foster's larger Physiology. 



('93). BENDER, ADOLF, UND ERDMANN, HUGO. Chem- 

 ische Praparatenkunde. 2 vols. Bd. i. 

 Anleitung zur Darstellung anorganischer 

 Praparate, von Bender, pp. vm, 530, with 

 102 figures, 1893. Bd. n. Anleitung zur 

 Darstellung organischer Praparate, von Erd- 

 ntan. pp. XH, 610, with 41 figures. Stutt- 

 gart, Ferdinand Enke, 1894. 



('93-'95). SCHMIDT, ERNST. Ausfiihrliches Lehrbuch 

 der Pharmaceutischen Chemie. Braunsch- 

 weig, Fr. Vieweg & Sohn. 3d ed. Inorg., 

 1893. Organic, 1895. pp. 648, vi. 4th ed., 

 1901. pp. XXXIH, 1,944. 



('94). BEHRENS, H. A manual of microchemical 

 analysis. With an introductory chapter by 

 John W. Judd. With 87 illustrations, pp. 

 xxv, 246. London and New York, Mac- 

 millan & Co., 1894. 



('94). LANDOLT UND BOERNSTEIN. Physikalisch-chem- 

 ische Tabellen. 2d ed. pp. xi, 563. Berlin, 

 Julius Springer, 1894. 



('94). The National Dispensatory. 5th ed. 1894. 

 Lea Brothers & Co., Philadelphia and New 

 York. pp. VHI, 1903. 



('94). SCHULZ, G., AND JULIUS, P. Systematic sur- 

 vey of the organic colouring matters. Trans- 

 lated from the German and edited with ex- 

 tensive additions by Arthur G. Green, pp. 

 vm, 205. London and New York, Mac- 

 millan & Co., 1894. 

 Very useful. 



