LABORATORY SUPPLIES AND CHEMICALS 



199 



3340 LECTURE Apparatus to show the combination of 3 vols. of hydrogen with 

 I vol. of nitrogen into 2 vols. of ammonia. 



3340a The tube, with 2 glass stopcocks $ 7.50 



3340b The support 4.50 



3342 LECTURE Apparatus to prove that water consists of 2 vols. of hydrogen 

 and 1 vol. of oxygen. 



3342a The tube, with platinum electrodes 7.50 



3342b The tube, with graduated arms . 10.00 



3342c The support, with binding screws for the poles 4 50 



3344 



3346 



3348 



3344 LECTURE Apparatus for the simultaneous electrolytical decomposition oi 

 Water, Hydrochloric Acid and Ammonia; to show that 1 vol. of 

 Hydrogen is combined with 1 vol. of Chlorine in Hydrochloric Acid, 

 with Yz vol. Oxygen in Water and with YT, vol. of Nitrogen in Am- 

 monia. 



3344a The tube with platinum electrodes $ 9.00 



3344b Tubes with carbon electrodes, each 9.00 



3344c Supports with binding screws for the poles, each 9.00 



3346 LECTURE Apparatus to show that Hydrogen and Oxygen are combined in 

 the same proportions as they are liberated from Water by elec- 

 trolysis. 



3346a Tubes with 2 glass stopcocks, each 7.50 



3346b The middle tube with glass stopcock, each 4.50 



334Gc The supports, each 4.50 



3348 LECTURE Apparatus to prove the invariable composition of Hydrochloric 

 Acid. 



3348a The tube * 4.50 



3348b The support with collar and holder 4.00 



3350 LECTURE Apparatus to show that 2 vols. of Hydrogen are contained in 1 

 vol. of Marsh Gas. 



3350a The tube 7.50 



3350b The support 4.50 



3352 LECTURE Apparatus to show that Ammonia contains 3 vols. of Hydrogen 

 and 1 vol. of Nitrogen. 



3352a The tube, with stopcock, rubber stopper and connecting tubing 7.00 

 3352b The cylinder, 36 inches high, with leaded base 8.50 



3354 LECTURE Apparatus to prove that there is no alteration of volume by the 

 combination of Hydrogen and Chlorine to Hydrochloric Acid, and 

 that consequently 1 vol. of Hydrogen and 1 vol. of Chlorine produce 2 

 vols. of Hydrochloric Acid. 



3354a The tube 5.25 



3354b The support of iron 4.00 



3354c Small glass bulbs for sealing up carbon disulfid. Dozen 1.25 



