Carbon Compounds in Concentrated Solutions. 215 



bnlb a and this was so large that the deposited solute did not 

 stop it up ; a small part was evaporated in bulbs b, and the 

 slight balance, if any, in bulbs e. Consequently the air passed 

 through a liquid of almost if not quite constant concentration 

 before it got away. The tubes connecting the sets of bulbs b 

 and g had a bore of about l*8 mm , so that the bubbles of air pass- 

 ing through were quite small. The tube e had a bore of about 

 04 mm and being bent as it was none of the liquid which con- 

 densed in that part of e which projected above the water bath 

 could get back into c but was drawn out by the current of air. 



In this way traps with troublesome rubber or ground glass 

 connections were avoided. The rest of the tubing had a bore 

 varying between l cm and 3 cm . This is tube 1. 



The solvent was contained in a tube like 1, but the part to 

 the left of f was omitted, a tube running straight up and bent 

 over instead, as shown by the dotted lines commencing at/ 1 . 

 ]N"o other variation from 1. It held about. 30 cc . This is tube 2. 



Two other tubes, just alike, consisted of a single column of 

 bulbs each, everything to the left of g being cut away, a tube 

 run straight up and bent over, and another bulb put in, A, as 

 shown by the dotted lines. Each tube held about 25 cc . These 

 are alcohol tubes 1 and 2. 



