SEICHES AND OTHER OSCILLATIONS 47 
2. Seiches in a Concave Semi-Parabolic Lake (§ 34, H.T.S. ) 
[a = 70 cm. ; A =10-9 cm.] 
h 
'1 
1 
T 
2 
Position of 
Uninode - . 
a 
Positions of Binodes ^ . 
a 
obs. 
calc. 
obs. 
calc. 
obs. 
calc. 
obs. 
calc. 
obs. 
calc. 
10-9 
1-73 
1-73 
•95 
•95 
•593 
•577 
•329 
•340 
■850 
•861 
9-4 
1-72 
1-73 
•95 
■95 
•580 
•577 
•331 
•340 
•838 
•861 
6-2 
1-74 
1-73 
•96 
•95 
•582 
•577 
•326 
•340 
•823 
•861 
3. Seiches in a Convkx Symmetric Parabolic Lake (§ 37, H.T.S.) 
A' O a A 
k 
h 
a 
T 
To 
Position of Binode 
a 
obs. 
calc. 
obs. 
calc. 
obs. 
calc. 
2^5 
35^7 
2-70 
2^72 
r24 
1^29 
•444 
•472 
5^4 
50 , 
2^5 8 
2^59 
r23 
1-23 
•457 
•472 
4. Seiches in a Concave Truncated Quartic Lake (§ 52, H.T.S.) 
A' O 0 g A 
[V 
h{x) 
- vrf 
.5594. 
d 
= 12] 
d 
I 
r 
T. 
T^ 
Ta 
T4 
Te 
T7 
obs. 
calc. 
obs. 
calc. 
obs. 
calc. 
obs. 
calc. 
obs. 
calc. 
obs. 
calc. 
obs. 
calc. 
12 
12 
12 
70 
84 
102 
8 
5-6 
3 5 
1^3 
1-5 
^•02 
r328 
1- 62 
2- 02 
•74 
•88 
1^13 
•688 
•85 
1^102 
•56 
•67 
•80 
•464 
•57 
■748 
•54 
•43 
•48 
•34 
•44 
•29 
... 
•39 
•25 
