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Improved Pocket Chondrometer. 



The Chondrometer being much relied on, by dealers 

 in grain and flour, in Europe ; it has been deemed use- 

 ful to give a cut of this instrument ; and directions co- 

 pied from those printed and accompanying it, according 

 to the scale used in England; from whence it was im- 

 ported. Our workmen can readily furnish any number 

 required of these valuable and portable articles. The 

 specimens of weights, No. I. are those of English grains 

 and grasses. No. II. are American average weights, ac- 

 cording to the best information which could be obtained 

 on a hasty inquiry. It would be well, if those better in- 

 formed would furnish a more general and accurate ac- 

 count of weights of American grains and seeds. It is 

 now the established custom to buy and sell wheat by 

 weight ; reckoning the bushel at sixty pounds. Barley 

 is also bought and sold at the standard weight of forty- 

 eight pounds. All grains and grass seeds should be sold 

 and bought by some standard weight ; — far preferable to 

 measures ; which are subject to great uncertainty, and 

 no small deception. Our mills, of the best construction, 

 make from twenty-one to twenty- three barrels, (each 

 weighing one hundred and ninety-six pounds,) of super- 

 fine flour, from one hundred bushels of wheat of the 

 standard weight. 



