IIH The American Geologist. AuRust, isoo 
on the facts now at hand, but merely as suggestions whicli 
are indicated bj these facts and which may he protitably 
borne in mind in future investigations. 
One other point deserves mention in this connection. From 
Huntsville to South river the Algoncjuin ])each rises at the 
rate of nearly six feet per mile.* Then from South river to 
Trout creek it appears to be about level. But from Trout 
creek to Nelson's, five miles northeast of North Bay, the beach 
descends northward about 75 feet in 38 miles. The Callender 
(C. P. K. ) observation also shows the same northward de- 
scent. If the fainter forms found in the Ottawa valley are 
accepted as continuations of this same shore line, as they may 
be, then they too show northward descent and apparently a 
slight eastward descent also. It might be thought that the 
northward descent from Trout creek to Nelson's is not in re- 
ality a measure of the deformation of the Algonquin plane, 
but that the beaches at the two places are not the same. This 
is of course a possil)ility. But at each locality, at South 
river. Trout creek, C'allender (C. P. R.) and near North Ba}^ 
in 1893 and again in 1895. the greatest care was taken to de- 
termine the upper limit of submergence and the result was 
clear and satisfactory in each case. Callender (C. P. R.) is 
about 18 miles east of a straight line drawn from Trout creek 
to Nelson's. The northward component of distance from 
Trout creek to Callender is about 21 miles and from Callen- 
der to Nelson's about 12 miles. The altitudes of the beaches 
are, 1,220 feet at Trout creek, 1,170 at Callender and 1,145 at 
Nelson's. Thus the northward descent from Trout creek to 
Callender is nearly two and a half feet per mile while that 
from Callender to Nelson's is a little over two feet per mile. 
This allows nothing for a possible east-w^est deformation af- 
fecting Callender. 
The beaches at these three localities are so situated that it 
can hardly be supposed that one was made and abandoned 
before another was begun. And the clear definition of each 
as the highest shore line adds much strength to the supposition 
of their unity as one beach. 
*Am. Geol., vol. XIV, Nov., ISt^. 
