THE STRUarURE OF THE NTTOLEIJS. 



151 



TABLE 6.— DIFFUSION. AMYL ALCOHOL DRIED OVER LIME. EXHAUSTION, 

 76-63 cm. FILTERED DRY AIR. FRESH NUCLEI BEFORE EACH EXHAUSTION. 



' Followed by 9 failures due to collapse Limed and distilled amyl alcohol. 

 • Followed by 5 failures due to collapse. 



14. EtJtyl alcohol. — Similar care had to he taken with absolute alcohol, though 

 there was less difficulty in avoiding a collapsing column. The initial plane did not 

 admit of depression. Whenever this was tried, the vessel was found to be filled 

 with nuclei on second exhaustion and it was necessary to clean it by aspiration 

 before another experiment could be attempted. Though many measurements were 

 made, the graph, figure 7, is not smooth and points to a high initial plane of 

 demarcation. 



TABLE 7.— DIFFUSION. ALCOHOL. EXHAUSTION, 76-62 cm. PHOSPHORUS 

 NUCLEI. FRESH NUCLEATION EACH TIME AND CLEANINCx THEREAFTER. 

 FILTERED AIR NOT DRIED. 



TABLE 8.— DIFFUSION. ABSOLUTE ALCOHOL. EXHAUSTION, 76-63 cm. FIL- 

 TERED DRY AIR. FRESH NUCLEI BEFORE EACH EXHAUSTION. VESSEL 

 CLEANED BY ASPIRATION. 



Veil of 5-10 cm. 



