1-3-8 Mr. henly’s Experiments and 
air, obferved, that after the water fo impregnated had 
been paired through a clofe filtering paper, it was ren- 
dered quite tranfparent, the iron being in perfect folu- 
tion. This clear liquor he endeavoured to preferve in its 
tranfparent ftate, by thing every means that then occur- 
red to him to retain the elaftic vapour, but without fuc- 
cefs, for in a few hours the tranfparency diminilltcd: 
afterwards the liquor became opaque, and depofited the 
iron that had been diflolved in it. 
2. Several gentlemen have obferved, that in working 
their electrical machines with great velocity, as heat was 
produced by the friction, the electricity was proportiona- 
bly leflened. 
3. Mr. errington, a gentleman who often recreates 
himfelf with mechanical operations, frequently ob- 
ferved, that after he had been for fome time brilkly 
working his drill, the firing of it became ftrongly elec- 
trical. 
4. Mr. ca vallo, who fometimes amufes himfelf with 
the violin, having played a few fprightly airs, examined 
at my requeft the hairs of the bow, and the firings of 
the inftrument, and found by his electrometer that both 
of them were electrical ; the former in a plus , the latter 
Sin a minus ftate. In this cafe, the xofin contributes to 
jc the 
