122 



THE ROYAL SOCIETY OF CA^JADA 



rests on a movable platform which can be raised by a screw C. The 

 temperature is observed by means of a pyrometer and regulated by 

 switches and a rheostat. 



The reduction of lag is affected by the use of a tubular retort A. 

 This consists of seven 12" lengths of 1" boiler tubing, mounted into a 

 common cast iron head. No part of the charge is thus more than 



^ 







cu 



APPARATUS FOR LIGNITE CARBONIZATION 



Figure 1 



\" from the walls of the retort, which has a capacity, to the top of the 

 tubes, of 2,300 grams of pea size lignite with about 35 per cent mois- 

 ture content. 



A satisfactory method for collecting the tar was only evolved 

 after many weeks of work and many failures. Not only was it hard 



