1826.] Philosophical TransacHoru for 1826, Parts I. and It. 59 



1 Avoirdupois pound. No. 1. 



1 Avoirdupois pound, No. 5 (in a box with smaller weights.) 



1 Weight of imperial gallon of water, No. 1. 



1 Imperial gallon measure, No. 3. 



1 Bushel, No. 3. 



1 Quart, No. 4. 



I Pint. 



A copy of the imperial gallon. 



quart, and 



pint. 

 1 Bushel. '^ 



1 Half-bushel. >for common use. 

 1 Peck. J 



1 Gallon. '] 

 1 Half-gallon. 

 1 Quart. I 



1 Pint. }» cyUndrical, for common use. 



1 Half-pint. I 

 1 Gill. I 



1 Half-gill. J 



1 Set of avoirdupois weights, from 56 lbs. to half a drachm. 

 1 Set of counterpoises for the above set of weights. 

 1 Set of troy weights, from one pound to one grain, with 

 counterpoises." 



'' Standards deposited at Guildhall , London. 



1 Imperial standard-yard with gold points. 



1 Standard-yard with steel terminations, No. 4. 



1 Imperial troy pound, No. 1 . 



1 Avoirdupois pound. No. 2. 



1 Weight of imperial gallon of water, No. 3. 



1 Imperial gallon measure, No. 5. 



I Bushel, No. 4. 



1 Quart. 



1 Pint. 



1 Set of avoirdupois weights, from 56 lbs. to half a drachm." 



At Edinburgh and Dublin sets of standards have been depo. 

 sited, corresponding with the set at Guildhall. 



As an Appendix to this paper, a tabie is given of the correc- 

 tion on account of temperature to be applied to the contents of 

 the gallon ; and in a postscript Capt. Kater awards to Professor 

 Bohnenberger, the honour of having fif-st proposed to determine 

 the length of the seconds pendulum by means of the convertible 

 pendulum, in an astronomical work, published at TUbingen in 

 1811. 



II. Description of an improved Hygrometer, By Mr, Thomas 

 Jones : communicated by Capt. Kater. 



This brief commuuication is as follows : 



