354 O. M. Lieber on the changes of the Coast of S. Carolina. 
Lastly, if we take the mean of the two numbers for chlorid 
of barium, namely, 121-96, we get for 
BOE SE = octomigs * RT - Ti=699 
OS Sa ee are + dae 
or, in the mean, 7-005. 
Hence, we find, that the equivalent of lithium, as deduced 
from the mean results of the above experiments, comes out 
6935 (=86-69 on the oxygen scale) 
7-080 (=88°49 te fai “ oe 
7-005 (=87°56 108 “ “ ’ 
or as we take the practical equivalent, or actual precipitating power, 
of chlorid of barium from the experiments with NaO, SO,, thos 
i , SO,, or the mean of the two, these numbers exhib- 
iting close agreement, and obviously indicate 7- as the true 
equivalent of the metal. It will be observed that the above 
method is independent of a knowledge of the exact equivalent 
of barium, and uses chlorid of barium merely as a means 0 
bringing sulphate of lithia into comparison with the sulphates 
a and magnesia—the equivalents of the two last named 
bases may be considered as ranking among those best established 
—and the small difference between the practical equivalents for 
chlorid of barium deduced from these two shows the probable 
extent of error involved in the assumption of the sare constant 
in the precipitate of the sulphate of lithia. 
While these results confirm those formerly obtained by the 
analysis of chlorid of lithium, I do not consider them of superior 
or perhaps even of equal value. The estimation of chlorine by 
the method of Pelouze is apparently one of the most simple and 
exact processes for the determination of an atomic weight which 
have ever been proposed, and it is, as I believe, fully applicable 
to the case of chlorid of lithium. . 
As the result of both sets of experiments we may fairly take 
the — 7° (=87°50) as representing the true equivalent of 
G ‘ 
ESPON ea a 
ArT. XXXVIII.—Notes on certain Ancient and Present Changes 
along the Coast of South Carolina; by Oscar M. Lier, State 
ologist,. S. C 
Ir is very evident that remarkable changes have taken place 
on the coast of South Carolina during the present geological 
epoch; changes, which have effected or are yet, effecting very 
QTy + e 
co : 
the hydrography of the immediate interior, and the elevation 
