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



435 



El i'l 7 I ^ a 5 s 7^^ 



7 o e 80 i 



No. 11882. 



No. 11896. 



No. F727. 



NO. F729. 



11870. 

 11871. 



11872. 

 11874. 



11876. 

 11878. 

 11882. 



11884. 

 11888. 

 11890. 

 11892. 



F727. 



F729. 

 11896. 



Per dozen 

 SCAIiE, Paper, metric. Same as No. 11871, but with zero at the bottom Each 



11904. 

 1190S. 



11912. 



11916. 

 1191S. 



SCALE, Paper, metric, printed on heavy bond paper, 3.5x23.5 cm; 20 em along one edge is gradu- 

 ated in mm divisions Per dozen $0.10 



Per hundred .75 

 SCALE, Paper, metric. 1 meter long, graduated in millimeters. For use vertically; zero at the 



top Each .06 



~ " .54 



.06 



Per dozen .54 



SCALE (METER STICK), Maple, 2 cm square. One face is plain and shows the length of the 

 simple meter; the second face is graduated in tenths of meters, or decimeters; the third face is 

 graduated in hundredths of meters, or centimeters; and the fourth face is graduated in thou- 

 sandths of meters, or millimeters. The last named face gives divisions also in decimeters and 

 centimeters. This piece is valuable in teaching students the metric system of lengths. . .67 

 SCALE (METER STICK), Boxwood. A high-grade stick graduated in millimeters on both edges 



of one face; other face blank 60 



SCALE (METER STICK), Boxwood. Same as No. 11876, but graduated in millimeters and 



inches -70 



SCALE (METER STICK), Maple. Both edges of one face are graduated in decimeters, centi- 

 meters and millimeters; one edge of the other face in inches and eighths .25 



SCALE (HALF-METER STICK), Maple. Same graduation as No. 11882 



SCALE (METER STICK), Maple. Same as No. 11882, but ends tipped with brass 40 



SCALE (HALF-METER STICK), Maple. Same as No. 11884, but ends tipped with brass .30 

 SCALE (DOUBLE-METER STICK), Maple, ends tipped with brass. Same as No. 11838, but two 



meters long 1.00 



SCALE (RULE), Maple, metric and English, 12 inches long, one face graduated on one edge in 

 millimeters and on the other in inches and 16ths. Double bevelled with protractor (5 degree 



divisions) on back Each .04 



Per dozen .40 



SCALE (RULE), Boxwood, metric and English, 12 inches long. One edge bevelled and accu- 

 rately graduated in millimeters, the other face graduated in inches and 16ths.Each .10 



Per dozen 1.05 



SCALE, Tap Drill, to determine the proper drill to use preceding the use of a machine screw 

 tap of any size. On one side is a list of machine screw tap sizes followed by lists of the 

 tap drill size numbers, their decimal equivalents, the corresponding body drill size numbers 

 and their decimal equivalents. On the reverse side of the scale is a table of decimal equi- 

 valents of ordinary fractions by f>4ths up to s^ths. At the lower end is an inch scale gradu- 

 ated to 64ths. Made of flexible spring steel 1^ 6 inches wide and 694 inches long 50 



SCISSORS, see Shears. 

 SCLEROSCOPE, see Hardness Testers. 



SCOOP. Agateware, 3x5% inches, with handle .20 



SCOOPS. Horn, flat and wide, with square ends, for ordinary use. 



Length, cm 10 12 14 16 



Each 15 .18 .21 .27 



SCOOP, Iron, adopted by the Cleveland Iron Chemists as standard for sampling iron ores 



Length, 3H inches: width, 2*4 inches: depth, 1% inches; with 6% inch handle 50 



SCOOP. Sampling, of heavy iron with wood handle, 5x4% inches 40 



SCOOP. Tin Plate, with handle, for mixing. Length of bowl, 8 inches; width, 5% inches . .46 

 SCOOPS, Weighing, see Balance Accessories. 



