OF CHEMICAL AND ASSAY BALANCES, ETC. 221 



'2609. CHEMICAL AND ANALYTICAL BALANCE, with 12-inch, beam, to carry 800 grains, 

 and turn with ^ of a grain, with divided beam, for slide weight, in French 

 polished mahogany box, on which also it stands for use . 4 5 



2610. DITTO, the same, in glass* case, with adjusting screws . . 660 



2612. Chemical Balance, with 12-inch, beam, to carry 1000 grains in each pan, and 



turn with y^ of a grain, divided beam with straight knife edges at the 

 ends, on which the pans are suspended by agate planes, fixed apparatus to 

 move slide weight, with short pan for specific gravities, etc., in glass case, 

 with adjusting screws . . . . . 8 10 



2613. THE SAME, in glass case, on 3 feet, without draw or apparatus to move slide 



weight, particularly suitable for pupils in the laboratory . 660 



2614. CHEMICAL BALANCE, with 14-inch, beam for 1500 grains, turning when loaded 



with YoV^ g ra i n > knife edges, agate centre and agate planes, divided beam, 

 slide moving apparatus, short pan for taking specific gravities, in glass case, 

 with adjusting screws, complete .... 15 



2615. Chemical Balance, 16-inch, divided beam, to weigh l^lbs. to 21bs., turning 



when loaded with y^o f a g ra i n > slide moving apparatus, in glass case, with 

 adjusting screws, 14 ; or with agate edges . . . 15 10 



2616. THE SAME, for general use in the laboratory, weighing to 21bs., and turning to 



y^ grain, in glass case . . . . . 8 10 



2617. ASSAY BALANCE, with 8-inch, beam, to carry 50 grains in each pan, and turn to 



2^0 of a grain . . . . . . 5 10 



2618. ASSAY BALANCE, with 10-inch, beam to carry 500 grains in each pan, turning 



distinctly with yg^o of a grain, in glass case, with adjusting screws 12 12 



2619. ASSAY BALANCE, with 8-inch, beam, to carry 200 grains in each pan, turning 



distinctly with yoVo f a g ra i n > the beam is constructed with 3 edges of agate, 

 and the pans are supported by agate planes, with apparatus for moving the 

 sliding weight ...... 18 10 



2620. Bullion Balances, to weigh 300, 1000, to 2000 ozs. at 30, 50, and 70 .< 



2622. SET OF GEAIN WEIGHTS, in mahogany boxes, containing the following weights : 



10,000, 6000, 3000, 2000, 1000, 600, 300, 200, 100, 60, 30, 20, 10, 6, 3, 2, 1, 

 6, -3, -2, -1, -06, '03, -02, -01. .. _ . . . 3 12 



2623. SET OF 6000 GRAINS to y^ grain, 3 3s. ; set of 1000 grains to y^ grain, 



1 15s. ; set of 600 grains to y^ grain, 1 10s. ; set of 10,000 grains to 

 1000 grains . . . . . . 250 



*#* Gramme weights, as above, of proportional subdivisions, at about the same prices. 



2624. Set of Troy Weights, from 10 ozs. down to y^ of an ounce, in box 330 



2625. SET OF WEIGHTS, of 100, 50, 40, 30, 20 ozs. . . . 550 



2626. SINGLE WEIGHT of 200 ozs. 2 2 I 2628. SINGLE WEIGHT of 400 ozs. 4 4 



2627. 300 3 3 I 2629. 500 ,,550 



