108 



A. DAIGGER & COMPANY, CHICAGO, U. S. A. 



Iron in blood 

 Iron in urine 

 Cholesterin in blood 

 Glucose in urine 

 Indican in urine 

 Sugar of milk in urine 

 Sugar of milk in milk 

 and many other tests 



2348 Colorimeter according to DUBOSCQ. 



The application of this colorimeter is most uni- 

 versal and it is found in use in medical, biological, 

 commercial and industrial laboratories for tests or 

 an extended variety, some of which are: 

 Sugar factories, for measuring the decolorizing 



power of animal carbon. 



Steel works, for measuring combined carbon in steel. 

 Dye works, for comparing coloring material. 

 Wine growers, for comparing the coloration of cut 



wines. 

 Distilleries, for examining the coloration of syrups, 



brandies, etc. 

 Other commercial laboratories, for testing mineral 



oils or any substance permitting a comparison 



of color or intensity. 

 Medical and biological laboratories, for the following 



tests: 



Hemoglobin in blood 

 Sugar in blood 

 Phenolsulphonephtalein 

 Uric acid in blood 

 Uric acid in urine 

 Creatin in blood 

 Creatin in urine 

 Creatinin in blood 

 Creatinin in urine 



Metereological observatories, for measuring the am- 



moniacal nitrogen in the air. 

 Water laboratories, for 



Ammonia test in water Nitric acid test in water 



Sulfuretted Hydrogen test in Lead test in water 



water Nitrous acid test in water 



Chlorine test in water Iron test in water 



"Duboscq" Colorimeter with glass cylinders 



10 cm. high, complete $120.00 



Extra Parts: 



Glass cylinder, 10 cm. high 3.50 



Glass plunger, 10 cm. high . . 7.50 



2348 2348A Nephelometer Attachment for the 



"Duboscq-Leitz" Colorimeter, con-" 

 sisting of: 

 1 Light-proof housing "S," enclosing the light and 



illuminating lenses. 

 1 Light-proof housing "T," enclosing the nephelom- 



eter attachments. 

 1 Curtain "U" to prevent the entering of light 



from the rear of the instrument. 

 Complete $42.00 



2348B Ditto, but adjusted to suit the original "Duboscq" 

 Colorimeter with 10 cm. tubes, of which the glass 

 cylinders move by rack and pinion. Complete 48.00 



2348C Colorimeter Petroleum. 



For determining color of Engine, Machinery and Cylinder Oils 

 according to The National Petroleum Association Standards, by 

 comparison with standard color glasses as follows: 



~A Cylinder Oil, Extra Light 



Filtered 



D Cylinder Oil, Light Filtered 

 E Cylinder Oil, Medium Filtered 



G Lily White N. P.'A. No. 1 



H Cream White. .N. P. A. No. l f / 2 



I Extra Pale N. P. A. No. 2 



J Extra Lemon Pale 



C Lemon Pale N. P. A. No. 3 



L Extra Orange Pale 



M Orange Pale. . . N. P. A. No. 4 



N Pale 



O Light Red N. P. A. No. 5 



P Dark Red N. P. A. No. 6 



O Claret Red 



METHOD OF DETERMINING 



Lubricating Oils. The color of 

 Lubricating Oils is determined by 

 placing a 4-oz. bottle of oil under 

 examination in one of the circular 

 compartments of the instrument. In 

 he opposite compartment place a 

 l-oz. bottle of Water White Gaso- 

 line or Distilled Water. Then place 

 one of the standard glasses in the 

 slot, and close the slide. The instru- 

 ment should be taken to a window, 

 where the observer, looking through, 

 can compare the color of the oil 

 with the standard glass. 



Filtered Cylinder Oils. To determine the color of Filtered Cylinder Oils they must first be mixed 

 with Water White Gasoline in the proportions of 15% Oil and 85% Gasoline. Then proceed as described 

 for determining color of Neutral Oils. 



2 Metal screw caps "M," to hold the test tubes 

 2 Glass Test Tubes "N." 

 2 Screw Sockets "O," to hold metal cups 

 2 Metal Cups "P." 



1 Source of light "Q" with illuminating lenses. 

 R, R. 



2348C 



