1813.] Tahles of Weights and Measures. 453 



An Avoirdupois pound is equal to 7002 Troy grains. From 

 this all the parts of Avoirdupois weight may be easily estimated, 



4. English measures of length. 



3 inches make 1 palm. 



2*64 palms 1 Gunter's link. 



1*1 36 Gunter's links or 3 palms I span. 



li span or 12 inches 1 foot. 



li feet 1 cubit. 



3 feet or 2 cubits 1 yard. ^ 



If yards or 5 feet. 1 pace. 



1^ pace or 6 feet 1 fathom. 



5i yards 1 pole. 



4 poles or 66 feet , 1 Gunter's chain, 



40 poles 1 furlong. 



8 furlongs or 1760 yards 1 mile 



The English ell contains one yard and a quarter, or 45 inches, 



5. English wine measure. 



28*875 cubic inches make 1 pint. 



2 pints , 1 quart. 



4 quarts 1 gallon. 



18 gallons 1 rundlet. 



3li gallons 1 barrel. 



42 gallons. . . , ^ 1 tierce. 



63 gallons ,1 hogshead. 



84 gallons, or If hogshead 1 puncheon. 



If puncheon 1 but. 



2 buts, or 4 hogsheads 1 tun. 



Sir George Shuckburgh Evelyn determined, by very accurate 

 experiments, that the difference between the length of tvv'o peh- 

 dulums vibrating 42 and 84 times in a minute of mean tiuie^ 

 in the latitude of London, at 113 feet above the level of the 

 sea, in the temperature of 60° Fahrenheit, and when the baro- 

 meter stands at SO inches, is 59*89358 inches of parliamentary 

 standard. A cubic inch of distilled water, when the barometer 

 stands at 29*5 inches, and the therm.ometer at 60° weighs ac- 

 cording to a mean of Sir George Shuckburgh's es:periments 

 252*506 grains Troy, and in vacuo 252*806 grains.* From 

 these data the English weights and measures might be restored 

 again supposing them lost, 



XL French Weights and Measures, 



o 



There are two sorts of French weights and measures that 

 . require to be known; namely, the old ones eiDployed before the 



« Phil. Trans. HQS, ^ol. Ixxxviii, p. iSS, 



