46 ROYAL SOCIETY OF CANADA 
taken as the most probable value. The following Table 1 gives the 
values thus obtained and the ratio /4s— /o, where M,, and y, are the 
specific molecular conductivities at ig¢ And 0° respectively. The con- 
centrations are expressed in gramme-molecules per litre at 0°, and the 
specific molecular conductivities in terms of this unit and of i0-* times 
Kohlrausch’s new unit of conductivity. The atomic’ weights used 
throughout this paper are relative to oxygen (16-00). 





TABLE I. 
Sp. Mol. Cond. Sp. Mol. Cond. /ys—Ho 
Concentration. at 18°C. at 0° C ST 
(43) (40) Us 
HCl (36:46) 
010 3706 2595 300 
005 3731 2608 301 
002 3753 2625 301 
001 3751 2626 301 


Hy SO, (98°08) 


010 5738 4086 288 
005 6154 4363 291 
002 6573 4628 296 
001 6984 4917 296 

It was found impossible to obtain concordant results with solutions of 
greater dilution than those above. It is seen, however, that the ratio 
Mis — Mo appears to reach a constant value in the dilute solutions, and I 
Hs 
have assumed that the value of this ratio for the solution of concentration 
0-001 would hold for infinite dilution. 
Table II gives the values of the specific molecular conductivities at 
infinite dilution for 0° obtained from Kohlrausch’s? values at 18° by aid 
of the above ratios. The conductivities are expressed as in Table I. 


1 Kohl. u. Holb., loc cit., p. 205, tab. 14. 
? Wied. Ann., 50, 385, 1893. 
