2i6 On the proposed Altiration 



of a gallon meter: on one edge of a rod are therefore en- 

 graven a series oi gallon meters, and upon the opposite edge 

 a series of bushel meters; — 1,2,8, upon the latter standing 

 against 2, 4', 6, upon the former. 



But in ascertaining the content of cylinders, either in bushels 

 or gallons, the meters consequently of the depths of cylinders 

 are different in their length from the metas used for the dia- 

 vietcrs, and for the dimensions of angled figures. In conse- 

 quence of these differences in the lengths of square and circu- 

 lar meteis, the former are engraven upon one side of the rod, 

 and the latter upon the other side. And there is the same 

 uniformity between the circular meters for bushels and gallons 

 as exists between the sanare meter, as before explained, as 

 2 to ] . 



And altliough the superiority of this invention over all 

 others for ascertaining dimensions in terms the most readily 

 introduced into practice, to give the final result, by the pen, 

 will be readily granted ; yet I have peculiar satisfaction in 

 being enabled to state, that its greatest advantage is its not 

 requiring computation at all, if the sliding rule be used. And 

 an additional advantage is, that the content for bushel or gal- 

 lon and from square or circular meter is ascertained by one 

 general operation. It requires no gauge point upon the rule 

 whatever, if an inverted line of numbers be substituted for the 

 ordinary line D ; or if the latter line be retained, the gauge 

 point for bushel or gallon from square or circidar figures, will 

 be the same in all cases; but, except for idlaging, a one-slide 

 rule is all that is requisite ; therefore the advantages are mani- 

 fold of which this invention is chief. Sliding rule;, best suited 

 to the purpose, I have also invented, to accompany the meter, 

 tliat notliing should be deficient. I will just state, that how- 

 ever importiuit my improvements may be in facilitating diffe- 

 rent commercial transactions, I think' that if the Legislature 

 were to pass a law to compel peoj^le to adhere to the just and 

 equitable mode of applying those measures, so that the con- 

 clusions might be tonformable to conmion sense, it would be 

 no more than the interests of many of the legislators, as well 

 as thousands besides them, render most imperative. This 

 letter would be too long if I were to enter into an history of 

 the tolerated barbarous perversions of true measures in our na- 

 tion J 



Allow me, gentlemen, to add that, if you will permit me, 

 / Kill prove, in your next Magazine, that, such is the extent 

 of this evil, a most valuable species of property is depreciated 

 above 20 per cent. I will not only prove that such is the case, 

 but I will also submit a rational tJieorv which shall be capable 



of 



