64

The Materia Me die a.

Part II.

Table of the quantity of abforbent earths fallible in acids.

<76 grains ofSpirit of Saltdilfolved of

576 grains of /Spirit of Nitre \tliffolved of

Thefe experiments do not fufli-ciently afcertain the point intendedby them ; in the firlt fett, thequantity of acid is too vague andindetermined : in the fecond, weare not told whether the acid wasperfectly faturated : and in both,the acids made life ot were fovery different from any that canbe fuppofed ever to exift in thehuman body, that little can beconcluded from them with re-

grains.

/'Crabs eyes

216

Mother of Pearl

144.

Pearls

J28

Oylter fhells

156

Hartfliorn

165

Coral

186

Oriental Bezoar

118

Occidental Bezoar

t2 3

Quick Lime

1 99

^Slacked Lime

1 93

/"Crabs eyes

2 97

Mother of Pearl

202

Pearls

219

Oyfter fhells

236

Hartfliorn

•*34

Coral

233

Oriental Bezoar

I08

Occidental Bezoar

I44

Quick Lime

l8o

\31acked Lime

2l6

gard to the medical effects of thefeablbrbents. Trial Should havebeen made with the mild vegetableacids, as the juices of certain fruits,four termented liquors; or ratherwith four milk. Neverthelefs thefe.tables, though not fo perfect ascould be wiflied, have their ule inthe hands ot fuch as can makeproper allowances See the experi-mental hiftory-of the materia me*dica, page 557.

Earths not dissoluble in acids, or other liquors.

The earths of this kind may be ranged in two duties:

Clafs 1. Hard l ryJti 'lUne earths: as the rubv, garnef,. emerald, fapphire, hyacinth, and other precious itones;cryital, flint, &c.

'"lpHESE kinds of fubftauces attributed to them, by the fuperfli--2- were introduced into medi- tlon of the earlier ages. Some ofcine, and many fabulous virtues them are itill preferved in foreign

phar-