V. MASS. 83 



350. Analytical Balance, capable of carrying 500 grms., and 

 a set of gramme weights. F. Sartorius, Gottingen. 



351. Analytical Balance, capable of carrying 200 grms., 

 with a set of gramme weights. F. Sartorius, Gottingen. 



352. Frerich's Analytical Balance, with contrivance for 

 weighing by means of torsion. F. Sartorius, Gottingen. 



353. Pair of Russian Scales. Bennct Woodcraft, F.R.S. 



354. Test Balance capable of carrying 20 grammes in each 

 scale. Edouard Sacre, Brussels. 



The bearings are taken off the knife edges when the balance is at rest. With 

 20 grammes the balance is affected by the 750th part of a milligramme. 

 With 2 grammes it is affected by the 7,000th part of a milligramme. 



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

 for verifying the standard kilogram weights, mounting and tongue 

 of aluminium bronze, tires and scales of aluminium, riders, 

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

 rests for four weights, rules for the use of 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, charge 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 Montr ouge, Paris. 



357. Printing Beam for Weighing Machine, admitting of 

 the registration of each weighing. M. Chameroy, Paris. 



This method of checking is applicable to all weighing machines of the 

 nature of the steelyard. It would be found useful at custom houses, depdts, 

 markets, railway stations, works, and other similar places. 



Its advantages are : 



1. The affording of a record, by means of a printed impression on a special 

 ticket, of the exact amount of the weight as determined by the machine itself. 



2. The facilitating of the reading of the weights, either on the ticket or on 

 the scale beam. 



3. The preservation of an exact record^ of weighings, the authenticity of 

 which is thus ensured. 



358. Physical Balance, weighing up to five kilogrammes. 



Hugo Schickert, Dresden. 

 F2 



