ISBN: 9781130826326

RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 134 pages. Dimensions: 9.7in. x 7.4in. x 0.3in.This historic book may have numerous typos and missing text. Pur… More...

RareBooksClub. Paperback. New. This item is printed on demand. Paperback. 134 pages. Dimensions: 9.7in. x 7.4in. x 0.3in.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. 1823 Excerpt: . . . precaution will float about the rooms, and especially during the operation of raising the stone when the ordinary apparatus will not apply, Mr. Abraham has constructed a muzzle (see fig. 8), formed of a frame of wood, the upper and lower pieces made circular to fit the lips; on this are fixed two or three thicknesses of crape or muslin, and it is studded with sixteen magnets, which will arrest a considerable portion of the deleterious matter before it can reach the crape; to the upper part of the wooden frame is attached a bent wire, to which crape is fixed for the purpose of protecting the nostrils. The whole is fastened by two strings passing round the head and tying behind. It has also been found that a semicircular frame similar to figs. 6 and 7, but without feet, having the magnets only on the face, may be worn round the neck with considerable advantage. N XV. DETACHED ESCAPEMENT. The Large Silver Medal was this Session given to Mr. George Savage, of St. Jamess Street, Clerkenwell, for his Detached Escapement. The following Communication has been received from the Candidate on the subject, and a Model of his Invention has been placed in the Repository of the Society. SIR; 5, St. Jamess Street, Clerkenwell. It is generally admitted by scientific practitioners in the watch trade, to be an important desideratum, to have an escapement produced that shall at once combine simplicity of principle, precision of performance, and cheapness of execution. An object that has long and much occupied my attention, and which, I persuade myself, is accomplished in the improved anchor or detached escapement herewith sent. It combines the most essential properties of the anchor, duplex, and detached. It is free from that extreme delicacy, which renders the two latter li. . . This item ships from La Vergne,TN., RareBooksClub<