Excerpt from The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Vol. 35: January-June, 1893 If hard glass be employed instead of porcelain, then there is insecurity in the joints between it and the glass used for the remainder of the apparatus. Metal tubes present similar difficulties with regard to the junctions, and are besides more or less porous at high temperatures. Another grave dis advantage is that, whether porcelain or glass tubes be used, there is always a chance of a crack occurring ...
Read More
Excerpt from The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Vol. 35: January-June, 1893 If hard glass be employed instead of porcelain, then there is insecurity in the joints between it and the glass used for the remainder of the apparatus. Metal tubes present similar difficulties with regard to the junctions, and are besides more or less porous at high temperatures. Another grave dis advantage is that, whether porcelain or glass tubes be used, there is always a chance of a crack occurring, and perhaps escaping notice. The reduction of the copper also presents great difficulty it is more difficult to get a strong stream of really pure hydrogen or carbon monoxide than to get the nitrogen; and any sulphur absorbed by the copper is a permanent disadvantage; for, as metallurgists know, copper contain ing sulphur may be oxidized and reduced many times and yet at each oxidation some sulphur will burn out. The reason is, of course, that sulphide of copper heated in air forms some sulphate of copper as well as sulphur dioxide. On the next reduction sulphide of copper is re-formed, and then, on passing air over the mixture, the process of incom plete oxidation is repeated. Judging by a discussion which took place in Section A of the British Association not long ago, these simple facts are not as widely known as might have been expected. I know of no reagent which will absorb sulphur dioxide so as to form an absolutely stable compound, and which is itself easy to prepare in a state of sufficient purity to be above suspicion of giving off foreign matters to the nitrogen. Of course it may he argued that a large number of vessels containing, say, a solution of caustic potash might be used, the second retaining the sulphur dioxide given off from the first, and so 011; but this device is obviously unsuited for a continuous process, where the reagents must be untouched for weeks or months. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at ... This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Read Less
Choose your shipping method in Checkout. Costs may vary based on destination.
Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
Choose your shipping method in Checkout. Costs may vary based on destination.
Seller's Description:
PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.