Show A feat in chemistry during daring a recent lecture delivered by prof B silliman jr in new york he be solidified carbonic gu ga this was effected by bringing sulphuric acid in in i contact with carbonate of soda in a strong iron vessel capable of resisting an expansive pressure of 34 atmospheres mo or pounds to the square inch prof S stated that this experiment had been given up entirely in france in consequence consequence of the bursting of several iron vessels by which a number of persons had been killed but he stated that tile the iron vessels used on this occasion had never been known to burst I 1 and the experiment was considered not at all dangerous As the liquid it being in a liquid state was drawn off a large laige portion instantly evaporated and by the ahe evaporation reduced the remainder to the fre freez ez i in ing point in this way several lbs ibs of carbonic cai bonic acid was wa S obtained bained it had bad the appearance of the whitest snow and was so cold that by holding it only three seconds the hand would be frozen he placed a portion of it around a long vessel containing mercury and froze the mercury solid the mercury was then taken out and hammered like lead |