1805.] 



New Patents lately enrolled. 



4t7 



alid replaced at pleafure. The fmell is 

 prevenied f' omgetting out of tnc receiver by 

 means of the foil-pipe from tne baiin torm- 

 ing an air-tighi jun6lion with it, cither \>y 

 having the enil of ihe pipe iinmeried in 

 watei, or lomc proper fluid, or otherwife 

 aiadeclpie by flanchet, infition, &c. 



MR. CHARLES HOBSON'S and MR. 

 CHARI-ES SYLVtSTER's (SHEF- 



FIELD), for a Method of Manu aBur 

 ing J.inc into Wire, and into Vejfds and 

 Ute/tfdsjor Culinary and other Purpofes. 



Wc have already, in a formi Number, 

 referred to this invention, and (hall now 

 ^iv» a more tuU aiid accurate defcription 

 oi it. •' The difcovcry (Cay the paten- 

 tees) upon wh;ch the proceifes of our me- 

 thod are groundei, and fo cfTentialiv De- 

 pend, IS, that zinc, which has net-n here- 

 tofore called a lemi-mttal, becaiife it is not 

 malleahlf, and fcarceiy capable of exten- 

 fion, bv mechanical mean*, at the ordinary 

 tempcraiUft of the stmofphere, or at thole 

 hea s which are ufually apolied in forg-'ng 

 or extending the metals cailet' entire me- 

 tall, is capibie of be.ntj extended by 

 hammering, laminating, wiie dnuving, 

 preffi g, ft imping, Sec, provided the zinc 

 be kept during the (aid operatiuns at or 

 about a certain heat 



By the method now made ufe of, the 

 zinc is caJt into incots or ihick pates. 

 Which, when inte.idt.i to be mechanically 

 wrought, are to he neateo in an oven to a 

 tempe'at'fte belwecii 210 and 3</0 degrees 

 cf the .'caleof Fahrenhc t. For wire, it is 

 molt convenient that the zi c be oaft into 

 Cylinders, and thefe are 10 be exrended bc- 

 kween rollers at the above tempeiature, 

 till their lengths are incienCed f ur times, 

 after which they rriay be drawn thiough 

 wire plates wi:hcu: far'.her he iti g or on- 

 realin<i unle.'s the pieces be vtry thick. 

 PLates of zinc may be made by woiking 

 it from ihc ingot or pirce between lo.lcrs, 

 at the tempeiature ^loielaiH, and tiiol'e 

 plates msv he hammtrtd up into vefiels 

 for cuiini-ry ])urpores by t e fame :ieat- 

 ment ag is applied to otner nictals, tak.rg 

 care, when. the iize or foiin, or itlier iii- 

 tended uquifittsuf tne vedcis require it. 10 

 heat or anneal the zinc at paprr times 

 •luring I he operation. Utenhls of every 

 dclciii-iion may be (tairi|.cd, furgtd, cr 

 *vrought, of zinc, duriag its nialieable 

 ftate ; and when it is nccefiary 10 unite 

 J»iecc8 or plates of zinc loprti'.er, f'dder is 

 10 be ufed coniiding v( two pi^rta of tin 

 and one part of zinc, mtjic or ic s, accord- 

 ii'U to the hardiu'fs an J fuliuiiiiy requited, 



or common glazier's folder may be ufed 

 and applied." 



MR. chapman's (holderness, york), 

 Jor a Mill Jo>- Tearing, Cru/hing, and 

 Preparii^ Oak-Bark, tobsufeaby Tan- 

 ners in ihi iVactfs of 7an?iing Hides. 

 The n-.tu.e of this inve .ion cannot be 

 defcribed witl.out the ufe of figures. It 

 will therefore be Itifficient to fay, that the 

 mill is adapted ;o the force of (team, wind, 

 water, or h' rlts, and ,hit the rag-wheels 

 may be made of any ki.id of metal. The 

 rag-barrel has twenty rows of ii.^es, or 

 more; this is kept clean by a fp;ke-roller. 

 A finallcr liairel, tui;iingin a Cuntrary dj- 

 reftion 'o the rig- barrel, ga'hers the bark, 

 and hoi s it fait by having the points up- 

 wards wniht the rag-barrci Is fearing it to 

 pieces. A cylinder feparates the ground 

 or torn birk, which falls into a bafket 

 adapted to the purpole Btns wre alia 

 placed to receive the fine and the coarler 

 dud. 



MR, marsland's (he aTON-NORRIS, 

 LANCASTER), Jor Improvemenls intbe 

 i'rocefs of Oytig Silk, Woollen, Mohair, 

 Fur, Hair. CotlOii, and i.inen, in a Ma- 

 vufaElur-d and in tiie Ranv State. 

 In our lalt we g-ive an account of Mr. 

 Marflind's :iierhod of fiziiig yarn. The 

 invent- n hue tiefcii'xi s but an exten- 

 fion, .rj>frna|is an ap lication only, of the 

 f<ime ui'iicijle. J'he articles to be dyed 

 muft be put into a-, air- tight receiver ; 

 then, by means .f ^n a. r pump, or other 

 means, a vacuum is to be produced, or as- 

 mucn of t'lc air exttaclrd as pofljble, and 

 (uchoftlie liquid niaten ds, or (ubftance* 

 commonly ulcd in dying, are ;o be intro- 

 duced into the receiver, care bsing taker\ 

 that no air, cr as Inle as pofiible, be ad- 

 mitted into it. The articles to be dyed 

 aie th',n (o remain in fuch 1 quid materials 

 as aic c ntaiatd i 1 the receiver until they 

 are (iitficijnily fitiirateti ih.rew.t'i. A 

 lid, grating bars of w;.od, or otlier fohd 

 fubftince, mull be placed within the re- 

 ceiver, at the diiianceoCa (ewinches fioin 

 the t:.p thereof, to prevent the articles 

 wh'cli <re to be dyed fiom riling above 

 the lui iacc of the liquor. 



A patent has been lately taken out in 

 Paris by the Sieur Dtfpiau, for an im- 

 pioveme.n in weaving, which rei.tieri it 

 niirtcedary for the workman to throw the 

 flui tk with his hand. The weavir 

 wlun he liiis his fout on the treadles to 

 open thi waip, at the fame time moves 



two 



