JVipissing Beach on the y^. Superior Shore. — Taylor. 311 
in reality lie parallel with the other lines, but should have 
been made to curve away toward the north before reaching 
the meridian of Sault Ste. Marie. The altitude of the sup- 
posed Nipissing beach at each place is show^n in the following 
table. The bights are in feet above lake Superior, which is 
602 feet above sea level. In the fourth column the approxi- 
mate theoretical hight of the Nipissing beach is given for each 
place as measured on the Nipissing plane produced from the 
south shore. The letter t stands for terrace ; r for beach 
ridge ; br for boulder beach ridge ; c for cave ; and d for 
delta. 
eries. 
Form. 
Observed 
Hight. 
Theoretical 
Hight. 
Series. 
Form 
Observed 
Hight. 
Theoretical 
Hight. 
9, 10 
t 
. 21.7 
20 
29 
d 
ap'r.55 ? 
60 
11 
t 
17.8 
21 
31 
61.4 
63 
12 
t 
27.2 
26 
33 
57.5? 
70 
13 
t 
29.1 
28 
34 
49.6? 
65 
14 
t 
28.5 
31 
35 
59.2 
66 
15 
br 
38.G 
35 
36 
89.8 
95 
16 
t 
32 
37 
37 
98 
96 
17 
t 
37.9 
41 
38 
92.7 
93 
18 
br 
43 
42 
41 
96.3 
97 
19 
r 
43.7 
43 
42 
102.9 
100 
23 
t 
48.4 
50 
43 
111 ? 
99 
24 
c 
45.6 
55 
44 
100.7? 
91 
25 
t 
45.3 
56 
45 
75.2 
78 
27 
r 
.52.1 
58 
46 
61.9 
72 
28 
t 
43.5? 
58 
48 
49 
Out of this total of thirty places it seems probable that the 
Nipissing beach is fairly well identified in all but six, and it 
is possible that those also are of Nipissing age. It seems 
probable, therefore, that the identity of the beach is made out 
at half or more of Lawson's forty-eight places of observation. 
The greatest number of departures from close coincidence ap- 
pear to be in the region of Thunder bay. Where cutting by 
wave action is very active it is not uncommon for a cut at a 
lower level to remove the remains of a higher beach. On that 
account some of the terraces which seem a little low have 
been taken as possible representatives of the Nipissing beach. 
On the south shore there is evidence that lake Superior was 
not affected by eastward elevation until after it had become 
independent in consequence of a very gradual and even north- 
