Abstract
In a former communication to the Royal Society “On the Properties of Liquefied Carbonic Acid,” printed in the Philosophical Transactions for 1861 (also in the Journal of the Chemical Society, vol. xv., page 163), I described a mode of manipulation whereby various solid substances were introduced into that liquefied gas whilst under very great pressures (varying from 500 to 1100 pounds per square inch), and the action of the liquid upon them observed. The experiments described in the present paper were made in a similar manner, but with some improvements in safety of manipulation, and in the mode of discharging the tubes, so as to recover the immersed solids in a satisfactory state.

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