V 
--yijH -i * -..I'- VV %f- 
f\ 
\ 
\ 
;f'\ 
i j^MKi 
ipt»tmrs 
natural 
y expect . She fresher, less saline water, composed 
chiefly of the il@ i? off of the rivers, sligpjfciy admisced witli 
& seas water % the tidal olangee 
fora a layer over the 
tenser, »or« saline ocean water brought in with the tidal flow* 
greater the salinity, the greater the specific gmvify will 
X MB 
he; consequently the fresh aster will tena to keep on top of the 
nor© saline lower water layer, and hence have practically so 
effect upon it* 
If there are any other points regarding which 1 stay 
oe ale to look up for yon 1 shall he only too glad to do it. 
bee&ur© 1 art sot sure 
yon wanted* 
w 
2 have given you is 5uet what 
Thers are lust a few more paragraphs which 1 wish to 
g^iote, frets the end of the chafer on { i amp© nature of the 'P.enort?. 
1 mm they are oi more than passing iufe ercst ; 
"She mean latitude 
& 
Chesapeake Bay is very nearly 
■nip’ *«ftt* 9M that of Can Francisco 
.#p- 
if 
he in© in. annual 
-p/ater temperature for the foiser Bay ie 14486? C, fS7,80°F,} 
that for the last or being 12.91® 0* f 55*85® W») * the 
Ciw.ef dliheresiQe between the t sssporature conditions of 
thece tx70 booioi; of water lies, however, in their respective 
annual ranges. In Chesapeake Bay this amounts to 22.12°c. 
|S9.cs e i\) # while in Ban Francisco Bay it is not much e 
than a third iw& m great, being *|/ °* (15 * 0S ° F * h 
