[ 239 ] 
They became moft beautifully co-3i" 
vered with an infinite number oft ins 
round air-bubbles. A great deal of*%* 
dephlogifticated air was obtained, 
which gave, by the nitrous teft, 
1.96; 1.873; 1.8375 2.68; 3.64. 336 
93- Some branches of a mul- 
berry-tree, covered with grey bark, 
were put in a gallon jar full of 
pump-water, and expofed to the 
fun. AL sooderate qsnety of air 
the fame quality with a 
its teft was 2.015°2.10; 3.10, igo 
SEC- 
