[ 2 9 T . 



matter with fome of the acid of the falts which 

 thefe waters contain, and thus forming a fulphureous 

 vapour which is volatile while they remain flightly 

 united, but which by a more intimate union would 

 form a real' fixed fulphur. From Dr. Wood's ac- 

 count of this water* it is evident that this fetid va- 

 pour, or at leaft the principles which form it, are 

 volatile -, for, he fays, the water keeps much better 

 in open than in corked bottles- 

 Each drop of a folution of thafoflil as well as of 

 the vegetable alkali occafioned a thick white cloud, 

 that fell* to the bottom of the glafsw And each 

 drop of a folution of filver in the nitrous acid gave 

 a milky cloud. Syrup of violets became green, and 

 an infufion of galls occafioned no- particular change 

 of colour. 



A hundred and two ounces, three drachms and "a 

 fcruple (or lib. vi. unc. vi, dr. 3. fcrup. 1.) were 

 put into a large Hone bafon, and let on a fand heat to 

 evaporate with a flow fire. 



As foon as the water was warm, it let drop a light 

 dark coloured earth, which gathered in fmall heaps 

 at the bottom of the bafon 5 and during this time*, 

 the water threw up fome air bubbles to its furfacej 

 when it was evaporated to about a pint (life, i.) it was 

 taken off the fire, and filtrated through paper : the cof- 

 fin through which At palled, _ after being dryed, was 

 found to have acquired 2 J grains. of additional weight 5 

 though I could not collect more than 3 gr, of a itone 

 grey coloured earth, which proved to be of the abfor- 

 bent or calcarious kind, for it effervefced with anddif- 

 folved in the vitriolic acid; the. remaining additional 

 weight of the coffin, Lbelieve, depended on fome of 



