BY HEAT OF METALS AND ALLOYS. ' 809 



On the E3:])ansion hy Ileai of Alloys. 



The alloys were made in the manner described in a former paper*, and tlie rcsnlts 

 obtained are contained in Table VII. 



I have grouped them together in the same way as I did when speaking of their electric 

 conducting-power. 



Table VII. 



No. 24. — Sn^ Pb gilded, thrice boiled. 



Loss of weight 

 T. in water =W. W(l+«n. 



12-0 7-04010 7-04345 



51-5 6-97425 7-06265 



95-0 6-81730 7-08610 



V,=7-03801(l + 10-*x0-6331<+10-''x0-0907O. orif Vo=l,theu V„a=l'007238. 

 No. 25. — Sn^ Pb gilded, once boiled. 



15-0 7-03845 704475 



59-4 ■ 6-95050 7-06620 



95'1 6'81635 7-08560 



V,=7-03817(l + 10-'x0-6068<+10-'x0-107O. or'fVo=l,then V,oo=l-007138. 



No. 26. — Pb4 Sn gilded, twice boiled. 



ll'O 5-26995 S-27190 



64-8 5-21670 5-29115 



95-8 5-10535 5-30965 



V,= 5-26715(l + 10-<xO-8171<+10-''xO-0263/=), orifV„=l, then V,oo=l'0»3434. 

 No. 27. — Pb^ Sn gilded, once boiled. 



ll'O 5'27395 5'27590 



52-8 5-22465 5-29410 



95-6 5-10975 5-31350 



V,=5-27124(l + 10-' X 0-8004<+ 10-° X 0-0401O. or if Vo= 1, then V,c«=l'008405. 



No. 28.— Cd Pb gilded, twice boiled. 



8-6 5-36850 5-36935 



56'4 5-31245 5-39260 



98-1 5-19620 5-41305 



V,= 5-36519(l + 10-* X 0-9012/ + 10-«x0-0834<=), or if Vo=l, then V,oo= 1-909095. 

 No. 29.— Cd Pb gilded, once boiled. 



9'2 5-60060 5-60175 



60'4 5-53286 5-62790 



91-7 5-44265 5-64415 



V,=5-59711(l + 10-'xO-8998;+10-<'xO-018i=), orif Vo=l, tlieii V„„=l-009180. 

 . * Pliilosophical Transactions, ISCO. 

 MDCCCLXVI. 6 B 



