866 DE. A. MATTHIESSEN ON THE EXPANSION 



Table III. (continued.) 

 No. 12. — Silver, thrice boiled. 



W(l+<rf). 

 5-49975 

 5-51300 

 5-6284fi 



V,= 6'49754(l + 10-^x0-6330<+10-'x0«0475<=), or if V„=l, then Vi„o=l"005805. 



No. 13. — Copper gilded, twice boiled. 



10« 5-82730 6-8290« 



S9*« 6-74696 6-8428« 



95-1 5-63155 5-85400 



V,=5-82644(l + 10-'x0-4223i+10-«x0-079lO. or if Vo= 1 , then Vioo= 1-005014. 

 No. 14. — Gold varnished, thrice boiled. 



94 2-44605 2-44655 



45-4 2-42625 2-45039 



951 2-36250 2-45585 



V,=2-44565(l + 10-" x0-4008<+ 10-^x0-03970. <>' if Vo=l, then Vioo= 1-004405. 



No. 15. — Gold, once boiled. 



10-7 2-44415 2-44490 



47-8 2-42226 2-44880 



93-0 2-36405 2-45380 



V,= 2-44381(l + 10-"xO-4142<+10-«xO-0276<'), orifVo=l, then Vioo= 1-004418. 



No. 16. — Bismuth varnished, once boiled. 



8-9 4-29915 4-29995 



51-2 4-25350 4-30680 



96-0 4-14795 4-31455 



V,=4-29857(H-10-"x0-359U+10-''x0-d294<'), or if Vo=l, then ¥,«,= 1-003885. 



No. 17. — Bismuth varnished, twice boiled. 

 11-6 5-16400 5-16625 



50-« 5-11255 5-17375 



93-5 4-99200 5-18335 



V,= 5-16416(1 + 10-" X 0-3413<+ 10-^ x 0-0599O. or if Vo=l, then V,oo= 1-004012. 



No. 18.— Palladium (purified metal, lent by Messrs. Johnson and Matthey), thrice boiled. 



7-5 - 7-48500 7-48700 



65-5 7-38976 7-49785 



97-6 7-21130 7-50875 



V,= 7-48545(l + 10-"x0-2708<+10-«x0-0497O. orif V„=l, then Vioo= 1-003205. 



