LABORATORY SUPPLIES AND CHEMICALS 



11 



1083 



DULIN ROTAREX, as above, large size, with universal motor, capable of 

 operating on either direct or alternating current. 110 volts, 60 cycles or 

 on 220 volts direct current. Net : . . . $125.00 



APPARATUS FOR WATER SAMPLING IN CREOSOTE OILS. 



1084 



SAMPLING OF CREOSOTE OIL IN TANK CARS AND STORAGE TANKS FOR 

 MAKING WATER DETERMINATIONS 



"It is recommended as good practice that, in order to obtain accurate determinations 

 as to the percentage of water contained in creosote oil in tank cars and in storage 

 tanks, the principle of zone sampling be employed, and described in the 1916 report 

 of your Committee (Proceedings, Vol. 17, pp. 447 to 456) and that for the purpose of 

 obtaining zone samples an apparatus of the type illustrated in this report be used." 



From Bulletin of the American Railway Engineering Association, Vol. 18, No. 195, 

 March, 1917. 



This apparatus consists of a brass cylinder with a pointed, perforated bottom. 

 The holes in the bottom are closed by means of a spring valve, which can be opened 

 by means of a wire extending along the extended stem attached to the cylinder. 

 This stem is made in several sections, so that it can be used at any depth. The stein 

 is calibrated in feet and inches, thus facilitating the zone sampling. The apparatus is 

 as illustrated. 



Price $45.00 



