Chapters on Papermaking Volume 3 (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. 1907 edition. Excerpt: ...the Production of a Web of Paper," and the author's publications before the Franklin Institute which bear on the influence of heat and moisture on the dehydration of gelatinous cellulose. B would do well after reading the question to dot down any headings on a slip of paper, and from these headings to construct his answer. All writers would find this method beneficial. He remarks, " I take it some examiners are broad-minded individuals." An examiner has a very difficult duty to perform, and it is certainly necessary that he should be as broad-minded as possible, and put as liberal an interpretation on the answers as he possibly can. The object of these test questions, however, is primarily not to examine but to help students to guide themselves in building up their knowledge, and in forming conclusions in their everyday work. It is impossible to teach, in the ordinary sense of the word, but it is hoped that it will assist all workers to use the paper mill as an object-lesson, and to gain a proper understanding of the general principles on which the practice of paperinaking is, and should be, based. When they are accustomed to this mode of procedure they will in time be able to advance their work without so much outside assistance. C says the " effect of heating the stuff is to make it work freely. I should think it affects engine-sizing in same way." Heat is very likely to influence the engine-sizing, but in order to ascertain what influence it might have, it would be necessary to conduct trials at different temperatures. Trials of this sort would be very useful and instructive. D says, "that heating the stuff is mostly done where the machines are provided with short wires, and where wet stuff or heavy papers are...