CEXTKAL, SCIENTIFIC CO., CHICAGO, TT. 8. A. 



57 



No. 722. 



No. 736. 



No. 734. 



721. WEIGHTS, Assay or Button, of Platinum, from 1 gram to 1 milligram with two riders; guaran- 



teed accurate to 0.01 mg. Weights from 20 mg down are of aluminum. In hardwood box ?24-00 



722. WEIGHTS, Assay Ton, of hard brass polished and lacquered, in mahogany box. These weights 



are accurately adjusted to a standard of 29.1666 grams equals one Assay Ton which therefore 

 contains as many milligrams as there are troy ounces in an avoirdupois ton. Hence if one A. T. 

 of ore assays one milligram, the ore runs one troy ounce to the ton. 



Xo. ABC 



Size 1/20 A. T. to, A. T 124 



Per. set $6.50 8.00 9.00 



724. WEIGHTS, Assay Ton, single weights. 



Size, assay ton 1/20 1/10 2/10 5/10 1 2 4 



Each . . . ." 1.00 1.00 1.00 1.20 2.30 2.60 3.25 



72G. WEIGHTS, Factor, of brass lacquered, for the rapid analysis of iron and steel. 



A. Carbon Factor 2.7273 grams Each 1.30 



B. ii Carbon Factor 1.3636 grams Each 1.30 



C. %, Silicon Factor 1.1755 grams Each 1.30 



D. Phosphorus Factor 1.63 grams Each 1.30 



E. 1/10 Silicon Factor 0.4702 grams (platinum) Each 7.00 



730. WEIGHTS, Normal Sugar, of brass, lacquered, in box. 



Xo. A B 



Set of 2 3 



Consisting of, grams 13.024 13.024 



26.048 26.048 



52.096 



Per set 5.20 . 6.50 



732. WEIGHTS, Normal Sugar, separate weights. 



Size, grams 13.024 26.043 52.096 



Each 2.00 2.00 2.00 



WEIGHTS of MEDIUM GRADE for LABORATORY and TECHNICAL WEIGHING 



734. WEIGHTS, Medium Grade, Metric, gram pieces of solid brass, flat shape, heavily lacquered; frac- 

 tionals of German silver; in polished hardwood box with hinged cover, with forceps; with sep- 

 arate compartment for each weight; fractionals under glass cover. 



Xo A B C D E F 



Size 1 mg to, grams 20 50 100 200 500 1000 



Per set 4.50 5.50 7.00 9.00 12.00 15.00 



736. WEIGHTS, Medium Grade, Metric, same quality as No. 734, but in polished hardwood block in- 

 stead of box, with brass forceps. 



No A B C D E F 



Size 1 mg to, grams 20 50 100 200 500 1000 



Per set 3.00 3.75 4.50 550 9.00 13.00 



