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5

that oil of cloves would do the same thing.
This was done with so much confidence, that I determined to give oil of cloves a thorough trial, although its odor makes it rather objectionable for preserving drugs and places it to begin with, rather beneath the bichloride in value. The bichloride of mercury, as it is well known, has no odor whatever and, consequently, does not interfere with the natural aroma of the specimens which, forms a prominent characteristic of some of the drugs. The oil of cloves was dropped at the bottom of some of the bottled specimens, in the same manner as this was done with the bichloride which was placed in substance into these bottles, but, even at the end of 6 months, it must be stated, that mould continued to flourish unabated and the conclusion, therefore, was only natural, namely: Oil of cloves does not answer our purpose in the preservation of botanical specimens of drugs as well as