LABORATORY SUPPLIES AND CHEMICALS 



105 



2345 COLOR COMPARATOR 



OR CAMERA. Improved form, 

 so constructed that shadows can 

 not be thrown upon the tubes. 

 With blue and ground glass. A 

 superior instrument $10.00 



2345a COLOR COMPARATOR. 

 Designed by Oswald Schreiner, 

 of the Bureau of Soils, U. S. De- 

 partment of Agriculture. This 

 instrument is used by the United 

 States Government, and elimi- 

 nates the objectionable features 

 of some other instruments. All 

 working parts coming in con- 

 tact with the sample or standard, 

 are of glass. Broken parts can at 

 any time be easily replaced. 

 The instrument is fully described in the "Journal of 

 the American Chemical Society, Vol. XXVII, Sept. 9, 

 1905," and "Bulletin No. 31, U. S. Dept. of Agriculture, 

 Bureau of Soils." 



Each, net $20.00 



Extra graduated tubes for above, per pair, net 4.50 



Extra plain tubes for above, per pair, net 1.00 



2345a 



2345C 



2345b COLOR COMPARATOR. "Lovibond's Tintometer," an instrument by 

 means of which the depth of color in liquids and solids can be 

 accurately measured in degrees, placed in their position in a 

 permanent color scale, and registered for reproduction at any 

 time. 



It consists of a graded series of standards made of colored 

 glasses numbered according to their depth of color, and an in- 

 strument for holding the glasses and the object to be measured. 



Special pamphlet covering the instruments in every detail 

 will be furnished upon request. 



No. 3a Set of Apparatus for Brewers, Maltsters, Sugar and 

 Caramel Manufacturers, Wine and Spirit Merchants, including 

 the improved optical instrument, box with stand and reflector, 

 ^2-inch and i^g-inch silvered cells, filtering apparatus, and 20 

 standard glasses, series 52 and 50 $62.50 



Extra apparatus for estimating the color of dry malt, 33 

 standard glasses, with trays, presser and standard white 29.00 



No. 6a Set of Apparatus for Estimating the Color in Oils, 

 Waxes, Lards and other Fats, Varnishes, Gelatine, etc., includ- 

 ing the improved optical instrument, fitted with hot water ap- 

 paratus for melting solids, with thermometer for taking their 

 melting point, case, 1 in., y 2 in. and 54 i n - silvered cells, without 

 Standard Glasses 67.50 



No. 6b Set for Estimating the Color in Cotton Seed Oil, 

 including the improved optical instrument, fitted with lamp and 

 hot water apparatus for liquifying the oil and maintaining a 

 given temperature, with 5 y$ in. cell and 36 Standard Glasses 95.00 



Standard Colored Glasses, each 90 



Standard Glasses, if ordered without apparatus and in even 

 numbers, or out of sequence of the fractional intervals in sets. 



Each 1.35 



COLOR COMPARATOR. Lovibond Tintometer. Simple Form, for 

 for estimating the color in cotton seed oil, fitted with standard 

 oil sample bottle and compound standard glass (yellow 35 4- 

 red 7.1). 



Complete 10.00 



Set of 24 Standard Glasses for above.. . 24.00 



2345 



