234 



PROCEEDINGS OF THE AMERICAN ACADEMY. 



SERIES II. 

 Large Capillary. 



vapor after completion of those with carbon dioxide could not be made 

 as in the former case, in consequence of which it is not certain that a 

 stoppage did not occur in the course of the series. While there was 

 nothing to indicate that such was the case, yet on account of its ex- 

 tremely small bore it was much more liable to stoppage than the larger 

 capillary. We consider the experiments with the latter to be certainly 

 accurate within two per cent. 



Nevertheless the agreement between the results of the first and second 

 series is perhaps as close as could be expected with capillaries so different 

 from each other in character. The relative viscosity coefficients of the 

 different gases were calculated from the values of the last column in the 

 table by means of formula (2). The results are as follows. 



First Series. 



V^ = 2.17. 



'/CO,, 



