106 



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



2347 



2347a 



2347 COLORIMETER, Kennicott-Sargent. It is especially recommended on 



account of the rapidity of operation while maintain- 

 ing the highest standard of efficiency possible with 

 the color method. The standard and unknown solu- 

 tions come in contact with glass only. The apparatus 

 consists of a wooden camera which exhibits on a dark 

 background the pictures of the sample and the stand- 

 ard side by side in the form of two large round discs 

 of color by means of light transmitted through the 

 sample and standard by means of swinging mirrors. 

 The body of the camera is of the correct shape and 

 focal length, enabling the observer to place his face 

 close to the mouth of the instrument whereby all side 

 lights and distracting rays are eliminated. The glass 

 parts consist of a tubular reservoir provided with a 

 glass plunger. From the bottom of a graduated glass 

 chamber there extends a glass tube connected with 

 the bottom of the reservoir, also a corresponding 

 tube for the unknown solution to be tested. 



The complete apparatus as illustrated $20.00 



Extra graduated cylinders, each 2.00 



Extra graduated cylinder with leveling system attached 4.00 



2347a COLORIMETER, Kennicott-Sargent's, modified by Campbell- Hurley. In 



this colorimeter the method of comparing the colors 

 is similar to that used in a half shade polariscppe, 

 the field consisting of a circular disc of light divided 

 vertically into two parts. The comparison tubes are 

 those of the well-known Kennicott-Sargent instru- 

 ment in which the unknown is placed in the left hand 

 tube while the color is matched by raising or lower- 

 ing the level of a standard solution in the right hand 

 tube by means of a glass plunger working in the 

 attached reservoir. 



A person looking through the eye piece observes a 

 single field divided vertically by an almost im- 

 perceptible line representing the contact point of the 

 hemispheres of the two comparison tubes. 



Complete 



Prices of separate parts see No. 2347. 



20.00 



