Temperature on the Viscosity of Carbonic Acid. 

 Table V. (continued). 



215 



No. 



Pv 



Pr- 



lh- 



100«. 



h- 





Mean 



t 2 . 



Mean 

 1i 



Com- 

 puted 













o 









84. 



773-83 745-39 



666-15 



0-37088 



181-49 1-6141 









85. 



773-961 745-70 



66623 





180-99 16309 









86. 



773-97| 745-67 



666-23 





18096 1-6280 









87. 



774-14 745-04 



666-21 





181-701 1-6136 









88. 



77401 



745-49 



66638 





181-45 



1-6072 



181-32 



1-6188 



1-6135 



89. 



774-41 



747-71 



660-30 037090 



2239 



1-7284 









90. 



774-32 



74794 



661-30 



225-0 



1-7312 









91. 



773-99 



747-87 



660-781 



223-4 



1-7631 









92. 



77433 



748-38 



661-66' 

 I 



223-7 



1-7669 



224-0 



1-7474 



1-7488 



93. 



771-47 



722-92 



66603 0-37071 



16-20 



1-0668 









94. 



770-89 



722-21 



665-19 



16-62 



1-0646 









95. 



769-33 



677-80 



561-76 0-37036 



17-18 



1-0602 









96. 



76914 



677-75 



561-63 



17-30 1 0621 









97. 



768-79 



677-40 



561-211 



17-47 ! 1-0620 









98. 



768-73 



677-38 



561-12J 



| 



17-62 1-0625 



1707 



1-0630 



1-0628 



Measurements 39 to 98 furnish data for computing the 

 constants in an empirical equation for carbonic acid ; and the 

 equation thus deduced is 



VL = i + 0-003725 t - 0-00000264^ + 0-00000000417 1 3 , 



Vo 

 between the limits of 0° and 224° C. 



The term containing t z is necessary on account of the rapid 

 curvature of the line representing the observations. The last 



column of Table V. shows the value of — = — deduced from 



Vx Vo 

 this equation for the temperature means of the second column, 



showing as close an agreement with the obser ved means of — 



as could be expected, except at 100°, where the deviation 

 amounts to about 2 per cent. The first series is, however, of 

 much less weight than the second series. The last column of 



Table V. shows the values of — computed to correspond with 



the means of the preceding column. The average deviation 

 of the observed means from those computed from the above 

 equation is thus 00020, or about 0'15 percent. The average 

 deviation of the individual results from their corresponding 

 means, taken as in the fifth series for air, is 0*0052, or about 

 0*4 per cent. 



Q2 



