Download or read book The Engineer's and Mechanic's Encyclopaedia Volume 1 written by Anonymous and published by Rarebooksclub.com. This book was released on 2013-09 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1835 edition. Excerpt: ...the manner whereby be produced it. He stated to Mr. Bannatyne, that, on the invention of his machine, he obtained 14s. per Ib. for the spinning and preparation of No. 40, (i. c. yarn of forty hanks to the pound); that a short time after he got 25s. per Ib. for the spinning and preparation of No. 60; and that he then spun a small quantity of No. 80, to show that it was not impossible, as was supposed, to spin yarn of so fine a grist, and for the spinning and preparation of this he got 42.I. per Ib.! These prices were obtained by the unrivalled excellence of the yarn; and it affords a criterion to estimate the value of the machine, when it is found that the price of yarn, No. 100, is at the present day only from 2s. 3d. to 3. per Ib., including the cost of the raw material, which is from IDA to Is. per Ib., this surprising reduction having been effected chiefly by the powers of the mule; and notwithstanding it was before supposed to be impossible to spin 80 hanks-to the pound, as many as 300 hanks to the pound have since been spun, each hank measuring 840 yards, and forming together a thread 167 miles in length! Although the principle of Crompton's machine was excellent, it was rudely constructed; his rollers were of wood, and all the parts clumsy; for Crompton was unused to tools, and knew but little of mechanics before he attempted to put to practice the beautiful combinations he had conceived. His first machine contained but 20 or 30 spindles. Subsequently, Stones, of Harwich, a machinist, constructed a mule in a workmanlike manner, making the rollers of metal, and applying clock-work to move them; the mule was thus adapted for 100 to 130 spindles. Baker, of Bury, and Hargraves, of Toddington, introduced some improvements. In 1790, ...