242 



Balances and Sets of Weights. 



No. 51 



51635. 3:10. 



51 631. 3 : 10. 



51636 odor 51645. 1:3. 



51 637. 1 : 3. 



51638. 1:4. 



Analytical Weights, somewhat simpler construction, accurately calibrated, Figure 51,631. 



List No. 51,628 51,629 51,630 51,631 51,632 51,633 51,634 



From 1 gr to 10 20 50 100 200 500 1000 gr 



Comprising together 31 51 101 201 501 1001 2001 gr 



Price per Set 0. 12. 0. 13. 6 0. 15. 0. 17. 1. 3. 1. 9. 1. 18. 



The weights, together with brass forceps are contained in a polished mahogany case; in sizes 

 to 1 gram they are made of brass with heads screwed in and are gilt; the fractional grammes, of 

 German silver, are under glass. 



We also supply sets Nos. 51,628 51,634 at the same price platinised instead of gilt. 



51.635. Analytical Fractional Gram Weights of Platinum and Aluminium, from 1 gram to 

 500 mg, 0.1 and 0.01 mg in duplicate, 0.001 mg in triplicate, in elegant mahogany 

 case with stout glass lid, each lying in separate frame, Figure, 0.5 to 0.01 mg 

 weights of platinum, 5, 2 and 1 mg of aluminium. Per set 



51.636. Analytical Fractional Gram Weights, of platinum, from 1 mg to 500 mg, in mahogany 

 case with lid and forceps, Figure 



51.637. Rider Weights, Figure, of aluminium, in dull walnut case with forceps, con- 

 taining 9 aluminium riders from 10 to 500 mg, for the rider slides of the analytical 

 balances Nos. 51,517 51,527, 51,52951,534. The rider weights can easily be recog- 

 nised one from the other by the number of the rings; the 10 and 100 mg have each 

 one ring underneath on each side; the 20 and 200 mg have each two rings, and the 

 50 and 500 mg each 5 rings. Case with 9 riders and forceps 



s. d. 



0.11. 



0. 12. o 



0. 5. 6 



51,638. Precision Weights, Check Standards, with No. I extra fine calibration, in polished 

 mahogany case with forceps, Figure, going from 1 mg to 200 grams, all "twos" 

 in duplicate, containing altogether 611 grams. The gram weights are gilt, and the 

 fractional grams arc of (lerinan silver, under glass 0.16.6 



Precision Weights, extra-fine calibration I, in polished pear-wood box with forceps, the 

 grains being o f phosphor bronze, the fractions of German silver, under glass, all the 

 "twos" being in duplicate. Figure 51,643. 



List No. 51,639 51,640 51,641 51,642 51,643 51,644 

 1 mg to L'O 50 100 L'uo 500 1000 gr 



Price per Set 0. 7. 0. 8. 6 0. 10. 0. 15. 6 1. 0. 1. 8. 



Cl. 214, 215. 216, 

 5491, U'17. 



