( 227 ) 



July 5 1906. 



In the second experiment the heating took place somewhat 



more rapidly. In l h 10' the inner bath was brought at 

 9 h 10' 29° .99 The separation of the bulbs has, of course, 



not advanced so far as in the first observation, and the 

 deflections of the galvanometer were larger. The tube re- 

 mained now farther behind the temperature of the waterbath. 

 9 40 31.60 [36] The meniscus is still dimly to be dis- 



tinguished here, and a thin light mist is visible through the 

 whole tube. Under the meniscus a somewhat darker band 

 of a light brown colour is seen. 



The position of the bulbs is now 

 0.365 at the top 

 0.390 between 43 and 44 

 0.405 „ 42 and 43 

 0.421 in the middle 41 

 0.443 „ „ „ 40 



0.450 „ „ „ 39 



0.466 between 37 and 38 

 0.483 and 0.510 on the bottom. 

 31.7 0.390 and 0.405 now go very rapidly to 



the top followed by 0.421. 

 At the place of the meniscus now only a 

 slight constriction and a light brown mist band are to be 

 perceived. 



10 45 31.900 The temperature is then kept constant till 



11 ''37 with no greater deviation than 0\004 and then from 



11 37 31.888 till 2"15 with no more deviation than 0°.002. 

 2 15 The mist has now entirely vanished and the bulbs are all apart. 



0.510, 0.483, 0.466 on the bottom 

 0.450 and further ones in the top, none 

 of the bulbs remain suspended in the body 

 of the tube; the bulb 0.450 was the 

 last to go to the top, whereas 0.466 had 

 already been on the bottom for some time. 

 A difference of temperature is no longer to be perceived. 

 At first the cooling took place more slowly. 

 3 31.550 A slight mist is perceived 



3 45 31.040 the mist has become distinctly denser. 



5 10 30.985 [5]. In this position the meniscus originates 



in a milky cloud in tin' lower pari of the tube. Further the 

 lowering of' the temperature proceeds too rapidly. 



