IOWA ACADEMY OF SCIENCES. 
101 
In order to cover the whole range of observations without 
drawing the curves upon too large a scale, the absciss83 are 
taken proportional to powers of the dilution. Thus, if m == 
0 1.0 3.0 3.0 4.0 5.0; Mol. conductivity. 
number of grams of Li Cl per litre, M = molecular weight of 
Li Cl = 42.37, we have m = , in which p is the desired 
convenient measure of the dilution. 
The molecular conductivity for infinite dilution (u^) was cal- 
culated from the conductivity at the three dilutions that seemed 
best suited to that purpose (viz. : v = 16, v = 32, v = 64) by 
( ^v ) 2 
the dissociation 
formula, k = 
and the mean taken 
as the nearest attainable approximation to the truth. The value:^ 
