new standards of weights and measures. m^ 



By the above comparisons the error of each weight in 

 parts of a grain is as follows : 



No. 1. No. 2. No. 3. No. 4. 



— ,192 — ,202 — ,336 — ,110 



Results of the comparisons of the four weights of the imperial 



gallon of water. 



No. 1. No. 2. No. 3. No. 4. 



Grains. Grains. Grains. Grains. 



1st series . . — ,272 — ,169 — ,186 — ,167 

 2nd series . . — ,155 — ,334 — ,416 — ,046 

 3d series . . — ,192 —,202 — ,SSQ — ,110 



Mean errors . — ,206 — ,235 — ,313 — ,108 



A wire equal to its error was now enclosed in each weight. 



The numbers and values of the wires inclosed in the gallon 

 weights are as follow : 



Grains. 



No. 1 . contains 2 wires, together = 0,366 

 No. 2. — 4 wires, — = 1,174 

 No. 3. — 3 wires, — = 0,791 

 No. 4. — 3 wires, — = 0,422 



The adjustment of the gallon weights occupied me till the 

 10th of April, when the balance was removed to Mr. Bate's 

 for the purpose of adjusting the standard gallon measures. 



Adjustment of the imperial gallon measures. 



It has been remarked that the form chosen for the gallon 

 measure is that of a hollow cone, terminated by a cylindrical 

 mouth of about an inch and a half diameter. The inside of . 



