Technology Quarterly and Proceedings of the Society of Arts Volume 11 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1898 Excerpt: ...should be used in order that an accurate analysis may be obtained. It will be seen also that the error due to an unknown quantity of water left in the sand after filtration is entirely eliminated by the use of the attachment. Mt. Prospect Laboratory, Brooklyn, N. Y. THE ACETYLENE STANDARD OF LIGHT. By H. E. CLIFFORD And J. S. SMYSER. In an investigation of some of the photometric properties of the acetylene gas flame recently carried on at the Institute, results were obtained which will be briefly stated, together with an explanation of the diagram of the apparatus used. The diagram shows merely the arrangement of the apparatus, and is not a scale drawing. The generator, d, Figure 1, is made of heavy galvanized iron. Calcium carbide is introduced in the form of large lumps, and the top is then closed by a cast-iron plate a, faced smooth, and having a rubber gasket between it and the top of the generator. The plate is held in place by means of a wrought-iron yoke b, through the top of which is a screw bolt c, which forces the gasket tight against the plate and the top of the generator, thus preventing any leak of gas at this point. The generator stands in a galvanized iron cylindrical reservoir e, and is surrounded by water up to within three or four inches of the top, means being provided for keeping a circulation of cool water through this outer reservoir, so that the heat which is developed within the generator can be carried off easily. A small glass reservoir f is attached to the top of a pipe g, leading to the generator, provided with a stop-cock h and a tube i, which connects the space above the surface of the water within it with that below, thus insuring a flow whenever it is needed. A piece of rubber tubing j forms part of this bypass, so that it c...