. Glasgow mechanics' magazine; and annals of philosophy . other Corres-pondents we have not time to notice. Communications from intelligent Mechanics will be very acceptable, in whateverstyle they may be written, if they contain a full account of the invention or im-provement, which is the subject of their notice. ?*^*^^^^O^A»^^»iO^^»»^0^^^^.0»*K^»^^^»»> Published every Saturday, by W. R. MPhun, 155, Trongate, Glasgow, to whomCommunications (p<^st paid) must be addressed. CURLL, FRINTBR. THE MECHANICS MAGAZINE, CONDUCTED BY A Committee of Civil Engineers and Practical Mechanics,
. Glasgow mechanics' magazine; and annals of philosophy . other Corres-pondents we have not time to notice. Communications from intelligent Mechanics will be very acceptable, in whateverstyle they may be written, if they contain a full account of the invention or im-provement, which is the subject of their notice. ?*^*^^^^O^A»^^»iO^^»»^0^^^^.0»*K^»^^^»»> Published every Saturday, by W. R. MPhun, 155, Trongate, Glasgow, to whomCommunications (p<^st paid) must be addressed. CURLL, FRINTBR. THE MECHANICS MAGAZINE, CONDUCTED BY A Committee of Civil Engineers and Practical Mechanics, * No bounds have been fixed to the improvement of the human species; the perfectabilityof man is absolutely indefinite ; the progress of this perfectability, henceforth above the con-trol of every power that would impede it, has no other limit than the duration of the globeupon which nature has placed us. No. xei. Saturday^ \lth^ptembery 1825. Price Sflf, ROTCHS IMPROVED FID FOR MASTS OF SHIPS; DANIELLSMODE OF DRESSING WOOLLEN CLOTH, & 66 THE GLASGOW IMPROVED FID FOR MASTS OF SHIPS. To Benjamin Rotch, Esq. ofFurnivaVs Inn, in the City ofLondon, for his Invention of anImproved Fid, for the UpperMasts of Ships and other Ves-sels. [Sealed, 2l8t August, 1623.] This improvement is a mode ofsupporting the upper mast of aship, by means of two levers adaptedto suitable frames or carriages ofiron, attached to the upper cross-trees, and which contrivance alsoadmits of the mast being loweredwithout slackening the rigging. Fig. 1, represents a section ofthe upper cross-trees, with the ironframes and levers attached thereto,supporting the top-mast. Pig. 2,is a side view of one of the ironcarriages, with part of the lever,upon a larger scale; a, is the lowerpart or heel of the top-mast; b, thetop of lower mast; c, the fid-plate,of three times the ordinary thick-ness ; d, d, are the two levers turn-ing upon gudgeons, e, e; and hereit may be observed, that the fid-plate which suppo
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