New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1872-06-26

phere have aernated with those OF the Southern homs
phere their greatest extension as IA assumed by tboso
who connect with the procession OF the eqnoxes tho
difference of temperature required for the change Inc
abrasons Of the rocks seem neither less
fresh hemisphere than In the other nor 90 the
disinieersted rocks stand out in a or
less bold relief in either case. However astro-
nOmical causes have been connected with tho
climatic conditions Of the world, reason for be-
lievng from any facts have observed that aterna-
tons OF temperature IN the northern and southern
hemispheres have been the primary and efficient
cause of glacial phenomenal The more consider these
Treat pairing machine by which rocky surfaces have
been fashioned The great geological agents are not
alone fire and water universally admitted Ice has
had a great share in tho work, and i believe this
also viii sooner or later be rScCgh at with equal
papabe evidence Of an lee mantle once spreading over
me sGsp rom %oheydeo on the Atlantic to Taca
buano on the Pacific coast the question naturally arises
how far tho southern extremity Of Africa as wen as
sion hope may live 10 see younger naturnists IN
vestigate these regions with me same object peioEe
that whenever such an investigation Is undertaken ny
competent observer will be found that ana ABOVE
all local glacial phenomena ana sun py sue Win Ine
there is also evidence Of southern crcumpolar glacial
agency. 49,, .,.,, 49, ,
too many details have done so puposely that no ono
may Of basng theories ON imperfect 9bserya-
TONED, and sha be thought fancul by geoogsts OF
all schools as have been at every step OF my glacial re-
fox for that Of wolf am an old hunter OF glacial
tracks, and know the footprint whenever hnd 1t.
COUNT PoURIALEs BRINGS IN FRESH EvIDEScEs.
While was transcribing this report Pourtales came
in with the statement that be had noticed tho first indi
cations OF an Andean glacier in this vicinity. have
visited the locality twice since. IL is magnificent
polished surface as we'll preserved any have ever
seen upon cold gacated ground under glaciers OF the
present day. with well marked burrows and scratches
action lat 80 g. at the level OF the sea The place is
only feet above tide level upon the slope Of hill
on which stand the ruins OF Spanish fort, near
the fishermans huts OF San Vicente. in tho Bay Of
San Vicente which lies between Conception Bay and the
Bay OF Aranco whether this polished surface Is the
work OF glacier descending from the Andes TO the sea
shore or not nave nG YET ge ss 70 s VICINITY
which after my experience in San Carlos should expect
ali along ao shore the glaciers Of the Andes ,Ss lad ds
the country The erratics here have the character
Of those observed further south. II Is true
run mainly from east TO west but there some crossing
the man Fen9 az anges tso aanetie ysyiaon
10 100 at TalcahuanO, April ~ the trne meridian Deal
ing 10 the night magnetic. shall soon know what
70 make Of this as start tomorrow for the interior to
go TO Santiago and join the ship again at valparaiso.
have hired private carriage, 70 DC o Spe 70 sV re
water fishes in the many streams Intervening between
this place and Valparaiso me trend OIL inc ga fat
have often observed IN New-England near the sea
shore where me glacial LOWE UP 70 p frPep in
land their trend is regular and due NJ 81 Whlle III
ittora marine animals, that we have excel
lent basis for comparison with the results of the deep
S Sen bet%een this and juan
shall make similar collections In Valparaiso,
na take SI DE- sendacGner with me- had almost for
gotten 20 say that have obtained unquestlonaDe evil
dence of the cTeaceous age OF the coal deposits OF
LoIa and the adjoining localities north and south,
which are generally supposed to be tertiary hgniies'
adduce other evidence to satisfy geoogsts OF
the correctness Of my assertion nave cUeeea yie
upon coal seams Ever truly yours l.. AGAssIZ.
TO Prof BENZ Perce superintendent u s. Coast survey