G2 



»;i:l.\'1'in casts — scollick. 



ail ciilirc siiiiiiiKM and been kept in a warm, div room lor llic rest of 

 the year wil lioiil slirinka.!;*' or ol lier eliaii;n'e ol" I'orm. 



Owiii;; (o llie small propoil ion of wah'i', lliis eompcMiml is so dense 

 and dries so lapidly llial il is willi dillienlly ponr<Ml into a mold, and 

 III iiiakin,!; easts of combs it is best lo warm the mold, till each hall' 

 with IIm' melted mixture, and press the hahcs linnly (oj^-ether. 



'lMi(^ e»»ini> (»r a. low I is, of course, cut otV bel'ore beinii' mohled. 'V\\o 

 ai'tilicia! comb is atlached b\ applying ji coal of the y'elatin compoiiiid 

 to the cranium, warmiiii; ihe base of the comb with a hot modeliiiji;' 

 tool, ami immediately prcssiiij;' lh(^c^lnd> in place, 



INIold marks and other imperfections are to be rcmoNcd Ity t rimmiiii; 

 with sharp scissors and running o\(M' the places with a wann iron 

 modeling tool, but sonu^ little practice is needed in order to do this 

 well. 



liy slight moditicat ions in the proportions of ,i;lne and water and by 

 \ar\iii,u the method of iminipiilat ion, casts may hv made of a .ureal 

 variety of objects, and the compound is, of ct»iirse, (Miiially avjiilable 

 for uclat in molds. 



II must be borne in mind that the addition of more water, whih> iii- 

 creasinu' llit^ lluidily of tlu> iiudtcd mass, also increases the ainonnt of 

 shriiikauc of t he cast, since, sooner (»r laliM, the water must dry out; 

 still, in most instances, a small ainonnt of sliriiikai;c is of litile coiise- 

 (piciice. 



Aiiolher inctliod ol making' a> cast is to till the mold with small 

 pi«>c«'s of I he coiiii)oiind which liavo been melted and dried, place the 

 mcdd in a steam o\eii with a \«'ssel contaiiiinu a litth> water, and sid>- 

 Jeet it to a c(mtiiiiions \\v\\{. The iiKiistiire piodnc(Ml by thee\aporat- 

 ill};" wati'r fiiith(>rs the meltiiij;<»f I he ^lue, and <'aii be dii\ en olV by 

 (>\posiire to <lry heat. 'I'he objection t(> tiiis method is the rapid de 

 lerioration of a phr^iter mold iiiider loiiy continued lieatinu, but w here 

 only one cast or a few ar(> to be inad(> this is of no conscipience. 



While this is the best method of heatinu a mold and keeping it 

 warm, it can b«' <lone siicc(>ssfiilly by iisiiii; a diM'p, o|teii pan contaiiiiii;;' 

 '_' or .'! inclies of sand. 



In makiiii; lari;•(^ casts, or e\ en those of moderate si/(>, a wooiU'ii 

 block or core may bo used not only as a matter of ec(niomy, but to 

 pcrmil the more rapid dryiiiLi ot' the mass, to lessen tlu> chanct> of 

 shrinkage, and to uInc a liiin base for tlie allachment of supports, 

 'riiiii casts, likt« the wattles of a 'owl. may be st reimthened with wire 

 cloth or w it h bolt inji' cloth. 



A i;idiiiid color may be .uiscn ti» gelatin casts l)y the use of dry or 

 tube colors, bill in eit lu'r case t h(> coloring; inatttM' should l>e thoittiiuhly 

 mixed with the glycerin before this is added to Ihe melted uliie. 



!\b>lds should l»t> shellacked and oiled befoie usiu<i', as in makiiiu' 

 plaster casts, and it maybe said that an oatmeal pot (»f t he ^la/.cd 

 ironware, known as •• tiianilew are." makes an e\cellei,| ^i;luepot. 



