862 EXPERIMENT STATION RECORD. 



ing from the globe which termiuates on one side, and which, by turning the cap, 

 uiav he made to coincide with either the inlet or outlet. The inlet tube is connected 

 with a reservoir containing the liquid to be measured. When full to the point of 

 overdowiug, the globe contains exactly the volume required, say 100 cc. To catch 

 the overflow another smaller globe with an outlet tits, cap-like, around the neck of 

 the first. 



Note on an improved specific gravity bottle or pyknometer, E. R. Squibb 

 {Jour. Amer. Chem. Soc, 10 {1S07), No. ,?, pp. 111-114, Jhj. 1).—A pyknometer, with a 

 stem graduated in such a manner that the specitic gravity of a liquid may be deter- 

 mined accurately at any of the temperatures of the standard unit volume. — v. av. 



MORSE. 



A new form of pyknometer, J. C. Boot {Jour. Amer. Chem. Soc, 19 {1S97), No. 1, 

 l^p. 61, G2,fi(js. 2). — A pyknometer with double walls, the space between them being 

 carefully exhausted. The liquid within the flask is kept more nearly at a constant 

 temperature by this arrangement. — F. w. morse. 



A new drying apparatus, O. Rkitmair {Zischr. aiKjcw. Chem., 1S96, Xo. 20, p. 613, 



fin- !)■ 



A new calibrated weighing flask, G. L. Heath (Jour. Am,er. Chem. Soc, 19 

 {1S97), Xo. 3, p. 10S,jhj. 1). — The tlask is especially adajjted to weighing liquids, as, 

 fur instance, portions for titration. — r. w. mokse. 



A new flask for rapid distillation with steam under pressure, J. Ziegler 

 {Chem.. Zlg.,21 {1897), Xo. 12, p. 97, Jig. i).— This is a retort-like flask, the bulb 

 having the shape of a flask, with the usual neck at the top, and a tube blown in 

 the side, in appearance resembling the delivery tube of a retort. The steam is 

 admitted through a tube which is lifted by means of a perforated stopper in tlie neck 

 of the flask, while the distillation products are carried out through the other and 

 larger tube in the side. The inconveniences of a small and bent delivery tube are 

 thus avoided. It is made of thick, annealed glass, capable of resisting pressure. 

 Steam under tension may thus be employed, and substances volatilized with diffi- 

 culty under other circumstances may be rapidly distilled in this flask. It may also 

 be used for distillation in vacuo. — .J. t. andersox. 



A new^ capped bottle for hygroscopic, easily decomposed, and strongly 

 odorous bodies {Chem. Ztg., 21 {1897), Xo. 16, p. 139, fig. 1). — This bottle has an 

 iuutr ground stopper and a cap fitting over this. The inner stopper is either hollow 

 or its upper part is cup-shaped, for containing absorbents or disinfectants. When 

 the flask is to be used for protection against the moisture, carbon dioxid, or oxygen 

 of the atmosphere, the stopper niaj- be filled with calciuui chlorid, concentrated 

 sulphuric acid, caustic alkali, or such like. It is recommended for holding standard 

 solutions, and also for malodorous substances and those whose vapors are unwhole- 

 some. As the flask will l)ear the temperature of boiling water if heated gradually, 

 it may be used as a sterilizer, and by filling the stopper with some suitable steriliz- 

 ing fluid the air surrounding the stopper and thus the contents of the flask may be 

 kept sterile. — j. t. anderson. 



A new laboratory grinder, C. A. Buck {Jour. Franklin Inst., 143 {1897), Xo. 855, 

 pp. 194, 195). — This grinder was designed by M. White, mechanical engineer of the 

 Bethlehem Iron Company, and has been used in the laboratory of that company for 

 3 years. It has given great satisfaction in giinding iron ores, limestones, fuels, 

 fire clays, magnesite, sands, etc. It grinds the most refractory substances to an 

 impalpable powder, and does it more uniformly and much more quickly than hand 

 grinders. — .j. t. andersox. 



The use of aluminum for condensers, T. H. Nortox {Jour. Amer. Chem. Soc, 19 

 {1897), Xo. 2, pp. 153-155). — Results of trials show that aluminum possesses about the 

 same advantages over glass as tin in connection with the distillation of water. It 

 is well adapted for the distillation of neutral organic liquids, especially low-boiling 

 substances. It is superior to tin in lightness and conductivity and to glass in the 

 latter property and in durability,— f. w. mokse, 



