432 



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



No. 11646 (five positions). 



No. 11642. 



No. 11640. 



F661. 



11640. 

 11642. 

 11646. 



F845. 



11796, 



RULE, Celluloid, metric and English, 6 inches long. Of white celluloid with one edge gradu- 

 ated in mm, other edge in eighths of inches. The two scales are numbered from the same end 

 of the rule, making easy a comparison of measurements in the two systems. This scale may 



easily be carried in the vest pocket Each .05 



Per hundred 4.50 



RULE, English and Metric, boxwood, 12 inches by 16ths on one side, millimeters on the other. 

 Four fold, solid brass joints, with brass caliper extension for measuring diameters up to 2% 

 inches or 70 mm. Made to carry in pocket $0.65 



RULE, English and Metric, light boxwood, 36 inches by 16ths on one side, millimeters on the 

 other. Six fold, spring joints, very convenient for comparing English and metric measure- 

 ments. Made to carry in pocket .50 



RULE, Johnson's Patent Combination. This six-inch folding pocket rule is made of spring Ger- 

 man silver accurately and distinctly graduated; it can be used as a Hook-rule, Caliper-gauge, 

 Protractor, Triangle or Try-square. The upper edge is graduated in 32nds, the lower edge in 

 16ths. The caliper blade is graduated in 16ths on one side and 32nds on the other. The pro- 

 tractor is graduated every five degrees and is provided with a vernier reading to % degree. 

 This handy and indispensable rule can be set to any desired angle, and the center joint is so 

 constructed that the rule remains firm wherever set 2.50 



RULES, Metric, see Scales. 



RULE, Parallel, see Drawing Instruments. 



RULES, Slide, see Slide Rules. 



RUPERT'S DROPS per dozen .50 



SAMPLE BAGS, see Paper Bags. 



SAMPLE BOTTLES, see Bottles. 



SAMPLE BOXES, see Boxes. 



SAMPLE JARS, see Jars. 



SAMPLERS, Hand, for Coal and Ore, consisting of sampler of tin with handle, divided into par- 

 allel troughs, and a scoop of sheet iron with band-iron handle. 



No A 



Dimensions, inches 6x8% 



Width of troughs, inches Vz 



Number of troughs 6 



Each . 2.25 



B 



7x9 



V4 



14 

 3.70 



C 

 10x10 



D 



11x12 



10 

 3.80 



4.15 



11800. SAMPLERS, Jones, for quick and uniform sampling of. ores, cement, coal, etc.; easily cleaned. 

 Complete with hopper mounted on support, 4 sampling pans, brush and scoop. 



No. . : A 



Size, inches 6x6 



Width of troughs, inches % 



Number of troughs 8 



Each . 11-00 



B 



10x10 



% 



10 

 19.80 



