G. EH. Moore—Amorphous Mercurie Sulphide. 4} 
of a moist rubber collar. As soon as the manometer of the 
pump indicated the maximum of rarification, the apparatus was 
inclined, whereby the water ran quietly from the bulb into the 
flask, penetrating every pore of the mass within it without form- 
ing a particle of scum. It was only necessary to remove from 
the pump, fill up with water, and, as soon as the temperature of 
the balance room had been attained, to weigh. 
Three determinations made in this manner on respectively 
19750, 3:8337 and 3°1155 grams, gave for the specific gravity 
the numbers 7-552, 7-551 and 7°553, in the mean 7552 com- 
pared with water at 15° C.* 
that calculated from the specific gravities of the ingredients. Accepting as a basis 
- A still more perfect accordance is the result when we employ the specific 
gravity of monoclinic sulphur, 1°982 (M.&S.); we then obtain the number 7*5188. 
t Pogg. Ann. xxxi, 581. 
