2. I posses a lithographic reprint of a page of a table, which appears, from the from of the type, to have been several years old.
3. The construction of the engraving becomes evident on examining it with a lens of sufficient power to show the continuity of the lines.
4. The Phalaena pardilla, which feeds on the Prunus padus.
5. Some of these weights and measures are calculated from a statement in the Report of the Committee of the House of Commons on Printed Cotton Goods; and the widths of the pieces there given are presumed to be the real widths, not those by which they are called in the retail shops.
Chapter 12
On the Method of Observing Manufactories
160. Having now reviewed the mechanical principles which regulate the successful application of mechanical science to great establishments for the production of manufactured goods, it remains for us to suggest a few enquiries, and to offer a few observations, to those whom an enlightened curiosity may lead to examine the factories of this or of other countries.
The remark—that it is important to commit to writing all information as soon as possible after it is received, especially when numbers are concerned—applies to almost all enquiries. It is frequently impossible to do this at the time of visiting an establishment, although not the slightest jealousy may exist; the mere act of writing information as it is communicated orally, is a great interruption to the examination of machinery. In such cases, therefore, it is advisable to have prepared beforehand the questions to be asked, and to leave blanks for the answers, which may be quickly inserted, as, in a multitude of cases, they are merely numbers. Those who have not tried this plan will be surprised at the quantity of information which may, through its means, be acquired, even by a short examination. Each manufacture requires its own list of questions, which will be better drawn up after the first visit. The following outline, which is very generally applicable, may suffice for an illustration; and to save time, it may be convenient to have it printed; and to bind up, in the form of a pocket-book, a hundred copies of the skeleton forms for processes, with about twenty of the general enquiries.
GENERAL ENQUIRIES
Outlines of a description of any of the mechanical arts ought to contain information on the following points