CENTRAL SCIENTIFIC CO., CHICAGO. U. 8. A. 



49 



No. 578. 



No. 576. 



574. BALANCE, Laboratory, similar to No. 572, but more sensitive and of better finish and construc- 

 tion. Mounted on polished, mahogany finished base provided with leveling screws. Sliding 

 rider on graduated beam indicates weight up to 10 grams in 1/10 gram divisions. Prismatic 

 steel bearings and supports. An eccentric movement operated by knurled head raises beam 

 from beam arrest. Provided with shelf for specific gravity work. Made of brass finely finished; 

 pans of aluminum. Plumb bob and protected adjusting screw as in No. 572. Height of bal- 

 ance, 48 cm; diameter of pans, 14 cm; length of beam (between knife edges), 32 cm. Capacity, 

 2,000 grams. Sensibility with full load, 30 milligrams or less, which is increased with smaller 

 loads i $27.50 



576. BALANCE, Lecture Table, constructed entirely of magnalium and aluminum, making it very 

 light and portable. Beam of magnalium 14 inches long. Knife edges and bearings of agate, 

 relieved from contact when beam is at rest. Provided with two pointers, permitting readings 

 to be made from front or rear. Scale on index plate 6 inches long, with divisions % inch 

 apart, easily read 30 feet away. Base of balance 20 inches long and 12 inches wide, with 

 handles. Height over all, 24 inches; diameter of pans, 6 inches. Pointer deviates 2 inches for 

 150 milligram load 150.00 



578. BALANCE, Moisture Scale, for determining percentage of moisture or sulphur in ores, etc. Pro- 

 vided with 6 inch iron plates, with tin scoop 15 x 8 inches and counterpoise. Beam graduated 

 on upper side to 1 pound by *4 ounce and on lower side from to 100% of one pound. Capacity, 

 4 pounds; sensibility, 1/16 ounce. Complete with set of weights from 2 Ibs. down 13.00 



