Scientific American Supplement, No. 288 (July 9, 1881)

Author: Various Authors
Published: 1881
Language: English
Wordcount: 42,650 / 136 pg
Flesch-Kincaid Reading Ease: 43.9
LoC Categories: AP, Q
Downloads: 461
mnybks.net#: 349
Origin: gutenberg.org
Genre: Periodical
Buy new from: Amazon or Barnes & Noble
Find it used: eBay or AbeBooks
Get as AudioBook: Audible or AudioBooks.com
Excerpt

in the fuel is shown in the result obtained. Apart from this my experience of the working of Berthier's method has been by no means satisfactory. There is considerable difficulty in obtaining pure litharge, and it is almost impossible to procure a crucible which does not exert a reducing action upon the lead oxide. Some twelve months ago I went out to Italy to test a large number of cargoes of coal with Thompson's calorimeter, and since then this apparatus has superseded Berthier's process, and is likely to come into more general use. Like Berthier's method, Thompson's apparatus is not without its disadvantages, and the purpose of this paper is to set these forth, as well as to suggest a uniform method of working by means of which the great and irreconcilable differences in the results obtained by some chemists might be overcome. It has already been observed that a coal rich in hydrogen shows a low heating power by Berthier's method, and it will become evident on further reflection that the higher the percent

Cover image for

Download


show mobile phone QR code

Donate a small amount via Paypal below or read about some other ways that you can support ManyBooks.