( h;A ) 
I. Obfervations of the Comparative, Intenfive or 
Specific Gravities of various Bodies. Mjcfe 
by Mr. J. C. 
f^Ump- water. iooo Borax. 1720 
Cork. 237 A fpotted fa&itious Mar- 
Saflafras Wood. 482 ble. 1822 
Juniper Wood (dry.) 556 A Gally-Pot. 1928 
Plum-tree (dry.) 663 Oyfter fliell. 2092 
Maftic. 849 Murex-ftell. 2590 
Santalum Citrinum. 809 Lapis manati. 2270 
Saatalum album. 1041 Selenitis. 2322, 
Santalum rubrum. 1128 Wood petrefied in Lough- 
Ebony. it 77 Neagh. 2 3 41 
Lignum Rhodkm. 1125- Onyx (tone. 2510 
Lignum Afphaltum. 1179 Turcois-ftone. 2508 
Aloes. 1 1 77 Englifli Agat. 2511 
Succinum peilucidum. 1065* Grammatias lapis. ^S l S 
Succinum pingue. 1087 A Cornelian. 2568 
Jet. 1238 Corallachates. 2605 
The top part of a Rhino- Talc. 1 ^57 
ceros-horn. 1242 Coral. %6B^ 
The top part of an Ox- horn Hyacinth (fpurious.) 2631 
1840 Jafper (fpurious.) 2666 
The (Blade ) bone of an A pellucid Pibble. 2641 
Ox. i6$6 Rock Cryftal. ~&59 
An human Calculus. 1240 Cryftallum Difdiaclafticum 
Another Calculus humanus. 2 704 
143 3 A red Pafte. 2842 
Another Calculus. 1664 Lapis Nephriticus. 2894 
Brimftone , fuch as com- Lapis Amiantus from Wales 
monly fold. 18 11 2913 
Lapis 
