1«05.] 



New Patents lately enrolled. 



347 



board are forced out of the frame, the 

 mould bi'srd taken off, and the tile 1 id 

 oil ■ flic, or plarf-d on a it-ige f.-nned of 

 boards, fimilar f^ thofe iiled 'or the com- 

 mon pan-tile. When the tiie^ are luffici- 

 entJi oric'i thev are dieffeil on a haifeor 

 ftoni, rcfemblin? the mould-hoard, ur<jpei 

 allowance bei:'g maiie for the (lirinking 

 of the tiles. Tlie tiles are tlien paired 

 face o face and chequered, in this (late 

 they are left until perfeftly dry and fit for 

 the kiln. 

 MR. Ralph wedgwood's (burslem), 



for a Compfition far making Clafs upon 



nenu Principles. 



Mr. We.i^wood mnkf's ufe of alkaline 

 fait, pieces o: parts i^f China, c earthen- 

 ware pitchers, or piecis of baked clay, 

 old plader iiioulds, (;r calcareous earths, 

 borax, fi iceous earths, and terra ponde 

 rofa. The alkaline fills and borax are 

 to be ul'ed in a liate of folution, and ui 

 this Ibiution, the pieces of c^ina, or e-ii th- 

 en waie, or baked clay, b:ing firit made ■ 

 red hot, are to be thrown; to thcfe are 

 to be added old plafter-m.uikl, or calca- 

 reous earth, firIt flacking them in a folu- 

 tion < ( borax in water, and then the fili- 

 clome-^vthi znd terra port Ji rofa are to be 

 added, all which articles are to be ground 

 togeilier, and dried over a flow fire. It 

 the alkaline falls and borax arc ul'cd in a 

 ftate of powder, they are then to be ufed 

 in the fame manner as in the common pro- 

 cefs. Wlien the feveral articles are 

 ground together and dried, thty are to be 

 fufed, and when in a ftate of perfe6l fufion 

 poured from the melting pot Into cold 

 water. 



The proportions of the materials are 

 from lo to 50 parts in weight ol alka- 

 line falls, from 12 to 70 of water, of the 

 pieces of China or earthen ware irom 50 

 to 150 parts, and if baked clay is ufcd 

 80 to 100 parts. There are other pro- 

 portions given, but an accurate regard to 

 them is not iibfoh'tely neceflary ; though 

 the patentee conceiues that by attending 

 to them a greater advantage will be gained 

 than can be had by the ptefent mode of 

 making glafs, and with a faving of health 

 to the labourers employed. 



MR. PETER. MARSLAND'S (HEATON 



NORRis, LANCASTER.), for Impro've- 



ments infixing Cotton yarn. 



" My invention (fays Mr. Marfland) 

 ^nnfifts in the extratlion of the air tiom a 

 VtlTtl ci-ntaining the cotton-yarn which i» 

 te b« fized, or the ptincipal part of fuch 



air, and confequently fiom the cotton- 

 ynrn itfelf, and applying the fize to the 

 cott' n yarn while the air is fo e.Ktrafled. 

 The more completely the air is extraifled, 

 'he more p.-rfe't will the operation be." 



When the air is properly extrafled, the 

 fize IS to be iniroduced into the receiver 

 1)/ means of a ripe and proper cock, or 

 by any (ther apparatus. When the fize 

 is admitted into the receiver it enters into 

 the yarn and impregnates it very rapidly. 

 To pr:-ver;t the yarn fr->m receiving any 

 injury, th>. fize mnft be introdiiced flowjy, 

 or the yarn packed in bugs, t\;c. When 

 the fize eiiters the receiver, it caufes the 

 quantity of air wh ch was not extra^ed 

 to rife to the ti^p of the receiver. To 

 prevent the yarn fiom rihng above the 

 iize, it mull be faftencd down, or a lid be 

 fixed within the receiver at a few inches 

 from the top. If it be defircd to give a 

 greater prefllire to the fize, after it is ad- 

 mitted into the receiver, than that of ihe 

 common atmofphere, the comiminication 

 between the receiver and the fize veflcl 

 mull be clofed by turning the cock, and 

 then one end of a forcing- pump may be 

 inlcrted into the top of the receiver j and 

 by means of it a quantity of condenfed 

 air may be f^/rced upon the furface of the 

 fize. 



After the yarn has remained a few mi- 

 nutes in I he receiver, it is 10 be placed in 

 a thin c.dd fize, to prevent its growing 

 hard, until it undergoes the next common 

 operation in the courfe of its manufai5fiire. 

 The fize anfwers bell when it is made 

 thick, and introduced at or near the boil- 

 ing temperature. The proccfs may be 

 facilitated by heating the yarn, to any 

 degree not exceeding that of boiling wa- 

 ter. Mr. .Maryland cnnfines his invention 

 for which he claims an exclufive privilege 

 folely to the extra£lion of the air from a 

 veflcl containing the cotton yarn, and ap- 

 plying the fize to it, whi!e the air is fo 

 exiravled. 



MR. THOMAS ROWNTREE'S (CHRIST- 



CHURCH, sURREv), for a nevj.in- 

 'utnted Axle trie and Box for Car- 

 riages. 



The nature of this invention cannot be 

 explained without the aid of figures j we 

 ran therefore do no more than make a re- 

 ference to the fpecification itfelf, and ob- 

 I'erve, that the advantages to be derived 

 from this mode of conltrufting axle-tree« 

 and bo-cs with -a mohile collar are faid to 

 be fafcty in travelling, and much left 

 draught to the borfci< 



Xxz VARIETIES 



