224 ESSAYS AND OBSERVATIONS 



Inches. 



Mean diameter of its mouth, 4f-3- 



IVJean diameter of the bottom, jf. 



Mean depth. 6 



It was five times carefully filled with 

 clear river water, which was each time 

 accurately weighed by a nice beam, that 

 would turn, with lefs than a grain, when 

 I GO ounces were in each fcale ; and its 

 content of water, at a medium of thefe 

 trials, which did differ but a few grains 

 from one vaorher, was found to weigh 

 26180 troy grains. 



At the fame time, a veflel which wa& 

 ma le to contain accurately, one hundred 

 cubic inches, was filled with the fame wa- 

 ter: And, after feveral trials, which did 

 not differ one grain from one another, its 

 content in water was found to weigh 

 25318 troy grains. 



The ftandard pint jug therefore con- 

 tains ^03^1^ cubic inches; and each cu- 

 bic inch of water with which the jug 

 was filled, weighs issifs troy grains. 



The ftandard Sterling jug in the cu- 

 ftody of the dean of gild of Edinburgh, 



likewife 



