7 The West American Scientist. 8 
sunk is 195.54 feet below sea level. Dr. 
arks: 
a in a guess as to 
the dept the water when these 
shells were alive? Shall we ae the 
depth of the nha to the of 
indicate, a lake o 
a ae tea only a 
lagoo r chain of lagoons, ee 
or Racwadketen. according to the 
er, which probably vane 
the catchment or surplus water in per- 
s seasons ual ainfall 
sometimes, after a prolonged vide- 
and forming an extensive expanse a 
few feet only in depth, as was seen in 
the valleys o 
the 
The rate of 
as t 
through countless cen- 
8 
myriads, w eith 
e they may be scraped up 
long the ‘capensis base of the San 
einto mountains, an old beach line 
is wel psagg tn Aan can be Degeads gre 
for ocks 
ek Ob Re reais ine, sharp nae ia 
ged above. This lin ual m 
urement has been hom be even with 
the present jeval of the 
Aajor W. H. Emory, in Slag of the 
Jnited States ee Mexican boundary 
survey, gave the iueine table of 
distances: 
San Felipe 
Vatiectto to Ca 
ohare creek 
ni 
to Vallecito, 17.85 miles. 
rr creek, 16.6 miles. 
to Big laguna, 26.41 
re ta na to New river, 5.83 miles. 
New rd to Little laguna, 4.5 miles 
ma laguna to Alamo Mocho, 16. 44 
vie 
hickaé Mocho to Cook’s well, 21.84 
miles, 
Cook’s well to Fort Yuma, 20 miles. 
Dr. opher Parry, bot- 
e 
boundary commission, in reporting a 
reconnoissan made in 849, wrote, 
Ws: 
ee ane region, as follo 
“On lea as 
a 
marine she lis 
and gypsum makes ae 
extensive beds. The 
the tableland shows a Variable ht ck- 
f water-worn pebbles, 
ing mountains. 
his 
s in a ¢g 
drainage of a large s 
which is sometimes visited by he 
showers. 
avy 
ains this rain-water, 
Svureoala for several 
hese sources fail, 
and other vegetation, while maga 
able portions sustain a heavy grow 
