When a solution of valerianate of quina is evaporated at a temperature of 130°, it does not crystallize, but has the appearance of an oil.
From the different appearances of this salt, it is highly probable that they each differ in composition. This phenomena is worthy of a thorough investigation.
The morphia salt was prepared in the direct way. It crystallizes in silky tufts; it dissolves readily in water.
Although but three of the salts of valerianic acid are employed in medicine, namely, those of peroxide of iron, oxide of zinc, and quinine, there appears to me no reason why those of potash, soda, ammonia, teroxide of bismuth, and oxide of ethyle, (valerianic ether), should not be employed by the physician.
In conclusion, I must express my sincere thanks to Mr. Savory, for his kindness in having placed at my disposal the materials necessary for the preparation of this series.
ESSENCE OF PINE APPLE.
The above essence is, as already known, butyric ether, more or less diluted with alcohol; to obtain which pure, on the large scale and economically, the following process is recommended:—
Dissolve 6
