Analyses of Clam and Oyster Shells. 183 
Soda, 6101 
Chloride of sodium, (common salt,) - 'S95 
Organic matter, - - . . 6050 
101-519 
The same shell burned till the organic matter and carbonic 
acid were nearly all expelled. — 100 grains gave of 
Silica, - 
none. 
Phosphates of iron, lime, and magne- 
sia, ------ 
1-856 
Lime, ------ 
73-610 
Sulphate of lime, - - - - 
1-210 
Magnesia, - - - - - 
2-078 
Potash, 
2816 
Soda. 
9 058 
Chloride of sodium, (common salt,) - 
1-323 
Carbonic acid, - - . - 
3043 
Organic matter, - - - - 
trace. 
99-999 
Shell of the common oyster, (Ostrea borealis) — 100 grains of 
the fresh shell, deprived of water, gave of 
Silica, ---..- 
none. 
Phosphates of iron, lime, and magne- 
sia, ------ 
.482 
Carbonate of lime, 
86-203 
Sulphate of lime, - - - - 
2061 
Lime, probably combined with orga- 
nic matter, - - - - - 
6-035 
Alngnesia, - - - - - 
•338 
Potash, 
•191 
Soda, ------ 
•518 
Chloride of sodium, (common salt,) - 
•172 
Organic matter, - - - - 
3-613 
99-613 
The same shell burned till nearly all the carbonic acid and 
organic matter were expelled.^ 100 grains gave of 
Silica, ------ none. 
Phosphates of iron, lime, and magne- 
sia, -800 
Lime, 91-918 
Magnesia, ----- -560 
Potash, -316 
Soda, -859 
