( 539 ^ 



Tlir (lain of tal»l(>ll <"iial)l<* ii> now to (IcIoniiiiKHlKMioniial horo .v„. 

 l>v iHCïiiis ot" laltic \1 \N(' liii<l foi' IIm' r<'<lii('e<l l(Mi,t>ili of (he nierciii'x 

 roluiun at 20°. (i ('. the xahios . 



4G.232 fin. 



46.215 eni. 



iiieau : 4G.223'' cm. 



HeiR'c al 20'' C. -. .s„ = 0.0053948 vm\ 



1^'roiii the data of lahle II we may also (leri\e (lie xdliime ofllie 

 widened part <i^ (lig. 4 of Comm. N" 50;. Tlie boi-e of (lie capillarv 

 1'^ was measured with a microscope by comparison with a line 

 graduation on glass by moans of a micrometer cyejuece. The bore is : 

 0.000301 cm". We then liud for the \'oliim(» of the })art J, between 

 the division 50 on the graduated stem and the mark on the ca|>illary 

 at 20° C. : 0.14239 cc. 



Using the value found for .>■„, we may derive from tal)le VI the 

 volumes I",^ between the division and the division (^,, and then, 

 using the volume found foi- the widened upper [tart, the volumes 

 from division (J to the mark on the narrow capillary. 



The calibration .1 has been made and reduced in entirely the 

 same way. The results of eitliei- are conibine<l in a table which 

 indicates the xolume for each centimeter dixisioii (J from to 50. 

 Table VII is an extract from that table. 



T ABLE VII. 



