Royal Society. ^7 
a powder with long iron hammers, Jike mallets, on a thick 
plank, picking out what ftones they find amongH: it , fo that at 
lafl tie Calamine is reduced to dull, and then it is fit for the 
merchant: The dufl oi Calamine conduces much to the curing of 
fore eyes, and it is frequently ufed for taking films off the eyes 
of horfes and other beads. 
Tljefpecific Gravities of fever al Bodies. Phil. Tranf. N° ipp, 
p. (^^4. 
PUMP-water -, _^ _ j^^^ 
Cork — — — 2^- 
Saflafras wood ■ — — — — ^g^, 
Juniper wood (dry) — — — — -.^ 
Plum-tree (dry) -^ — . -- _ ^^ 
Maflic 
Samalum Citrinum 
— ; albura 
Ebony 
Lignum Rhodium 
Afphaltum 
Aloes 
Succinum ^ellucidum 
Turcois-ftone 
Euglifp agat 
849 
8op 
1041 
ruhrum — — — - n^g 
— — — 1177 
— 1125 
— — — 1179 
— — — 1177 
^. "^ — "^ ^0(^5 
"Ptngue ^ ^ - ^ J 08 7 
Jet "^ . — — — 12 38 
The top part of a rhinoceros's horn — 124^ 
The top part of an ox's horn — »-^ j g . ^ 
The blade-bone of an ox — — , 16 s6 
A human Calculus — . — — • 1240 
Another human C^/r/J/^j — — i^^o^ 
Another Calculus • — . — . . — i66/l 
Brim ftone, fuch as is commonly fold ^ — 15 n 
Borax — ^ ^ i^^o 
A fpotted faditious marble — -^ 1822 
A galley-pot ~- _ • _, i^^ g 
Oyfter-ihell -. ^ _ /^^^ 
Murex-fhell — — . — ^^p^ 
Zapis Manatl — i -^ — 2270 
Sslenitis — — , — 2222 
Wood petrified in Lough Neagh — - 2341 
Onyx-ftone ^ _ _ . ^^j^ 
i:5c8 
2512 
Vol. III. " ' H Gram 
