[ 96 3 
duated gage of cork faftened to a point of each, fe- 
verally weighed as follows ; 
Grains 
N* I 49 
2 47 4- 
3 47 
4 46 i 
5 46 
6 43 
Sum of Weights 279 4. Grains. 
the medium weight, being the exact weight of a cubic 
inch of cork is 46 ® . 
Experiment If. 
N® I, 2, 3, 4, formed a float named A, being 190 
grains of cork, which was faftened to a medallion 
oflead, weighing two ounces, by a wire that weighed 
eight grains} thefe being put into a deep jar of 
Thames water, taken above the new bridge, the lead 
weighed exadily 44 grains} fo that 190 grains of 
cork fupported precifely 916 grains of lead in river 
water. 
Experiment III. 
The float was left in the fame water, immerfed by 
the medallion for the fpace of 48 hours, with a view 
of obtaining a precife knowledge of the quantity of 
water the cork might imbibe } how its buoyancy 
might be affeded } and how much extenfion it might 
acquire from a certain continuance under the water. 
