APPENDIX. 919 



346a. Series of Massive Copper Weights, standards of 

 1 gramme up to 20 kilogrammes, with subdivision in platina. 

 Necessaire for inspector of weights and measures on his rounds, 

 weighing about 10 kilos, and containing every requisite for testing 

 scales, of weights, measures of capacity, and of length, and for 

 stamping. 



Messrs. Collot Brothers, Boulevard de Montrouge, Paris. 



346b. Ancient French Standard Weight of the city of 

 Rouen, of brass, in the form of a series of cup weights in a 

 closed box of ornamental shape, weighing altogether 8 Ibs. of the 

 old poids de marc de Charlemagne. Presented to the Standards 

 Department in 1869 by Colonel Le Con tens, Viscount of Jersey. 



H. W. Chisholm. 



346c. Weight, wrought iron, ornamented with arabesques, 

 flowers, and masks. Made for the old Mint at Madrid in the 17th 

 century by the iron-master Salinas. 



Archaeological Museum, Madrid. 



354a. Model Balance, with two columns, specially intended 

 for verifying the standard kilogram weights, mounting and tongue 

 of bronze aluminium, tires and scales of aluminium, riders 

 carriage for shifting the weights from one scale to the other, 

 rests for four weights, rules .of deposit for small sliding weights, 

 replacing the divisional series of the gramme, such as the deci- 

 gramme, centigramme, milligramme, 10th of milligramme, hand 

 of aluminium with double dial, parallel mirror for reading the 

 oscillations at a distance, spherical level, two " Baudin " ther- 

 mometers. 



Messrs. Collot Brothers, Boulevard de Montrouge, Paris. 



354b. Model Balance, with two columns, of 300 grammes 

 range, for chemical analysis, mounted on cast-iron tripod, mount- 

 ing and tongue of bronze, platina tires, riders showing tenths 

 of the milligramme, spherical level. 



Messrs. Collot Brothers, Boulevard de Montrouge, Paris. 



381a. Corn Balance, in box. L. Casella. 



392a. Bullion Scales. The property of the Conservatoire 



des Arts et Metiers by gift, 1866 ; constructed by Baron Seguier. 



The late Baron Seguier, Membre de I'Institut. 



4O7b. Electric Chronograph. Dr. Werner Siemens. 



This instrument, which was described in the year 1845 in Fogg. Ann. 

 (Bd. 66, p. 435), serves for the measurement of high velocities, especially 

 those of projectiles both along the barrel and in their further flight, and also 

 that of electricity. 



