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froft. The white flocking within the black, railed 
the weight of 1 lb. 1 oz. 6 dwt. j, half a pennyweight 
more feparated them. I find no note here taken of 
the weight born by the ftockings applied externally 
to each other. 
April 6. A hazy and wet morning; but the 
wind at north-eaft. With new ftockings; the white, 
being within the black, raifed 1 1 oz. — without, 6 oz. 
With another pair, that had been much ufed in ex- 
periments; the white, within, raifed 6 oz. — without, 
3 °z. 
April 1 6. A clear dry morning ; the wind at 
north-eaft; Fahremheit’s thermometer at 48. Of 
the new, the white flocking, within, raifed 1 lb. 
5 oz. — without, 6 oz. if dwt . — Of the old, the 
white flocking, within, raifed 8 oz. — without, 5 oz. 
1 5 dwt. 
The laft obfervation I find marked, is of the 1 9th 
of May; the weather clear; the wind at north-eaft; 
the thermometer at 55. The white, within the 
black, raifed 10 oz . — and without, 6 oz. 
It is to be remarked, that by this time I had got 
the old ftockings wafhed; and now there appeared 
little or no difference between the power of them and 
of the newer pairs; though the latter had ftill the 
advantage. 
In making the experiments, it was neceffary to lofe 
as little time as poflible, on account of the wafte of 
eledlricity: I could therefore feldom proceed to the 
accuracy of fractions of a penny weight; nor often 
indeed of thofe of an ounce ; and this is the reafon 
that my notes run generally in round numbers, which, 
however, may be depended upon. 
The 
