342 THE ANALYST. APPARATUS. Platinum Basin with Chimney and Draught-holes. A. Hebebrand. (Zeit. fiir Untersuch. der Nahcr. und Genussmittel, 1902, v., 719-721.)--Tbe apparatus consists of a platinum basin having a number of circular holes around and just below its edge. The basin is covered with an aluminium lid, from the centre cf which a chimney rises. The latter is about 11 centimetres high and 1.8 centimetres in diameter. The top of the chimney is closed, the opening being at the side, so that no dust, etc., may fall into the basin. Substances which burn with difficulty, such as meat, bread, and sugar, are completely incinerated in about one-half the time usually required, and the amount of ash agrees closely with that obtained by igniting in an open basin. w. P. s. Apparatus for Cold and Hot Filtrations.P. N. Raikow. (Chem. Zeit., 1902, xxvi., 732.)-In the annexed sketches are shown jackets for surrounding funnels with either freezing mixtures or steam, which have the advantage over other devices that not only the sides, but also the top of the liquid heing filtered is directly exposed to the desired temperature conditions. In the cold funnel (Fig. 1) the FIG. 1. FIG. 2. vessel b is a hollow dish with depending flange fitting round the jacket, and is filled with ice or freezing mixture. The inner funnel should be fixed as high as possible in the jacket, and the annulus filled completely, so that air-space may be reduced to a minimum. In the hot apparatus (Fig. 2) c is a coned cover connected at p with the steam-supply, and joined at u by means of the rubber tube k with the inlet of the lower jacket.If preferred, k may be done away with by making u and r verticsl so as to form a telescopic joint. F. H. L.THE ANALYST 343 Automatic Apparatus for Titrations. W. Schmidt. (Chem. Zeit., 1902, xxvi., 734.)-This is a burette stand which automatically sets the burette at its zero-point, and is much simpler than most other patterns, avoiding the usual inconvenient rubber ball. The burette itself is clamped on to therod d, which is rigidly connected with the little table c ; c and d together slide up and down the rod b over a distance of about 14 centimetres. The chain shown in the diagram is fastened at one end to c, passes over a pulley at the top of b, and, when the table is at its highest position, is hooked over a pin a on the table on the further side.When not in use c is allowed to rest on the base of the main stand, in which position the zero-point of the burette is 2 centimetres below tho lowest position of the liquid in the store bottle, and the reagent flows into the burette to fill it. When the small table is raised the zero-point is about 2 centimetres above the highest position of the liquid in the store vessel, and the reagent runs back through the curved rubber tube till the 0-point is set correctly, The burette cannot overflow, as it is some 12 centimetres longer than the zero-spot. The elevated position of the small table is specially convenient during it renders the pinchcock or stopcock than usual. The apparatus is made by tit ra tion, since more accessible J.Briincker and Condenser Co., of Ilmenau. F. H. L. for Volatile or Noxious Liquids. H. Goeckel. (Chem. Zeit., 1902, xxvi., No. %.)-This is an apparatus of the Liebig pattern, in which the inner tube is forked at the outlet end, one branch passing through a cork to the receiving flask, and the other returning backwards to the opposite extremity, where it is bent and passed through the outer wall. By this arrange- ment the condensing surface for a given length of water- jacket is doubled ; while the tube d may either be connected to a second condenser when extremely volatile liquids are being distilled, or it may be coupled to a pump for distillations under diminished pressure. If the vapours are unpleasant or poisonous, the rubber tube fastened to d can be led into the draught cupboard.The tube a is shown as lying vertically over e for convenience of illustration, but actually they are twisted so as to344 THE ANALYST. be in a horizontal plane. may be obtained from Sauer and Goeckel, 49, Wilhelmstrasse, Berlin, W. The apparatus is protected as a Gebrauchsmuster,” and F. H. L. A Modified Wiborgh Flask. H. Goeckel and J. Wolf- mann. (StahE and Eisen, 1902, No. 12.)--As shown by the illustration, the Erlenmeyer flask in this apparatus is expanded at its neck so as to form a funnel, while at the spot indicated by the arrow it is provided with a vertical channel. The lower extremity of the upper vessel is also provided either with a similar and opposite channel, or with a hole in its neck, through which liquid can be introduced into the flask. This device has the advantage of doing away with any glass stop-cock, and of making the apparatus less liable to injury. The joint may be made perfectly tight by pouring water into the funnel. The apparatus may be obtained from Sauer and Goeckel, Berlin. F. H. L. EXAMINATIONS of INSTITUTE OF CHEMISTRY. the Institute will be held in London during January, 1903. The Intermediate Examination will commence on January 6. Examinations on all branches of the Final, excepting Biological Chemistry, will commence either on January 6 or January 13. Applications for admission to the examinations must be forwarded to the Registrar not later than Tuesday, December 2, 1902.