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



No. 13598. 



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No. 13612. 



i i_ : --H-^ rp gs!^!L^ 



No. 13618. 



13598. THERMOMETER, METALLIC, Demonstration Form, with glass back to show the internal 

 mechanism, which consists of a strip of two metals soldered together and connected with an 

 index hand by a multiplying lever. Diameter 6 inches. Range, 50 to 150 degrees F. . $4.50 



THERMOMETERS FOR OIL TESTING 



13606. THERMOMETER, Paper Scale, for Cold Test, graduated from -20 to 120 F., in 2 divisions. 



For determining the congealing point of lubricating oils. Length, 8 inches 3.30 



13608. THERMOMETER, Paper Scale, for Flash and Fire Test, graduated from -20 to 230 F., in 1 



divisions. For use with No. 9676 Open Fire Tester. Length, 12 inches 3.30 



13610. THERMOMETER, Paper Scale, for Wax Test, graduated from 90 to 150 F., in % divisions. 



For determining melting point of waxes, paraffines and greases. Length, 12 inches. . . . 4.40 



13612. THERMOMETER, Solid Stem, Engraved Scale, for Cold Test, graduated from -20 to 140 F., in 



2 divisions, for determining the congealing point of lubricating oils. Length, 8% inches 2.50 



13613. THERMOMETER, Solid Stem, Engraved Scale, for Cold Test, graduated from -40 to 100 F., 



in 1 divisions. Length, 30 cm 2.00 



13614. THERMOMETER, Solid Stem, Engraved Scale, for Cold Test, same as No. 13613, but graduated 



from -40 to 40 C., in 1 divisions. Length, 25 cm 2.00 



13616. THERMOMETERS, Solid Stem, Engraved Scale, for Distillation. Pointed for 3 inch immersion. 



No A B C 



Range, degrees F 30 to 400 30 to 750 100 to 950 



Size of subdivisions, degrees F 2 2 5 



Length, inches 15 15 16 



Each - 4.15 8.25 9.10 



13618. THERMOMETERS, Solid Stem, Engraved Scale, for Distillation. Same as No. 13616, but grad- 

 uated in Centigrade scale. No A R C 



Range, to, degrees C 200 400 510 



Size of subdivisions, degrees C 1 1 2 



Length, inches 15 15 16 



Each 4.15 8.25 9.10 



13622. THERMOMETER, Solid Stem, Engraved Scale, for Distillation of Gasoline, graduated to read 

 from to 270 C. Made according to specifications of the United States Bureau of Mines. 



(See Technical Paper 166, May 1917, page 21) 4.15 



13624. THERMOMETER, Solid Stem, Engraved Scale, same as No. 13622, but graduated from 20 to 



520 F. in 2 divisions 4.15 



9663. THERMOMETERS, Solid Stem, Engraved Scale, for Flash Test, for use in oil cup of No. 9662 

 Bureau of Mines Flash Tester. Graduated in % degree divisions. 



No A B 



Range, degrees C 0-50 40-110 



Each 8.25 8.25 



9669. THERMOMETERS, Solid Stem, Engraved Scale, for Flash Test, for use in oil cup of No. 9668 

 Bureau of Mines Flash Tester. With round bulb, graduated in 1 degree divisions. 



No A B C 



Range, degrees C 100-210 200-310 300-410 



Each 8.25 8.25 9.90 



