222 THE ANALYST. APPARATUS. A Flask Support. F. Reiss. (Chem. Zeit., 1901, xxv., 351.)- This device consists of a round-topped tripod carried on a short sleeve, which fits over the tube of 8 Bunsen burner, and which bears a thumbscrew for clamping it at the desired height. The upper ring also supports a suitably bent wire to hold the neck of a flask whilst being heated in a sloping position, as is necessary in working the Kjeldahl process (for which the stand is primarily intended). Obviously the neck support can be omitted and the sleeve increased in length indefinitely; and thus the apparatus forms the only stand required to hold a flask or retort before the mouth of a condenser, the gas fl&me burning at the upper orifice of the sleeve itself. F. H. L.THE ANALYST. 223 A Form of Volumenometer.F. W. Jones. (Chem. News, vol. lxxxiii., p. 100.) -The apparatus is designed for specific gravity determinations in the case of substances which cannot be brought into contact with water, and consists of a gas burette with stopcock, connected at one end with a stoppered bottle, and at the other end with a reservoir of mercury. The bottle should be small, and have a stopcock fitted to one of the two openings in the ground stopper. It is mounted on a spring platform, whilst the stopper is fixed, and the second opening is connected, by a rubber tube, with the burette, which, in turn, is connected to the mercury reservoir as usual. A known weight of substance being placed in the bottle and the stopcocks opened, the reservoir is raised until the mercury just reaches the top of the burette ; whereupon the burette stopcock is closed and the bottle placed on the lower shelf, the barometric pressure of the mercury being then read off. When the air in the bottle has attained room temperature, the bottte stopcock is closed and that of the burette opened, the fall of the mercury in the burette and its rise in the reservoir being noted. The results are calculated by the formula: v -v- wherein V, is the gas volume of the l- P - d - r 9 A bottle and connections ; P =the pressure ; v the volume of gas in the burette at the reduced pressure ; d the amount the mercury falls in the burette ; and r the amount of its rise in the reservoir. Then, V being the volume of bottle and connections c. s. W when empty, the specific gravity is v - v,'