The New York herald. [volume] (New York [N.Y.]) 1840-1920, 1860-01-07
FOURTH AND LAST LECTURB.

FOURTH AND LAST LkCTCtSbs
The concluding lecture Of the Rev. Dr. oahl in his alb
breva,ed astronomical course, was delivered before an
OVERLOOKING audience at the Academy OF Music last
pg The fame which the talented and reverend gentle
man has gained for himself since bis arrival in America,
BY his brilliant talents and diversified information has
been spread abroad through the agency Of the press aud
the longer he stays in the city the larger will his au
diences become As happens however, circumstances
Immediately call him away The lecture last evening
was highly instructive and entertaining, and was intend
ed to demonstrate the power Of the telescope In magnify
ing Objects The reverend gentleman first directed atten
ton the anatomy Of the human eye, explaining thai
the diameter about Of inch and tina.
this is known the Of the eye The extraordinary
mechanism of this part OF the body, he eloquenty dis
coursed upon there be any organ that brings
10 and makes Ike the Creator himself 1t 10 the eye
Its wonderful organism vas indeed, thing Ut Tor the
highest degree or scientific and philosophical contempa
ton and the illustrations Of the Doctor were perfect In
every respect He then proceeded from this basis 10 the
more immediate branches Of his subject, and showed
this connection he gave interesting explanations OF
what is known as perspective by artists and painters
Light be explained radiates from the centre In straight
lines Near the centre object will appear In full light
but increases In distance, the object naturally loses
vo;umiuous light had been shown BY Lord Rosss eie.
scope be aggregation Of brilliant granular DUST and
this discovery e0e thus resolved billions OF
ocky light hitherto believed but granular light made
up from bJ Of suns appearing as one light On this
absruse part Of bis subject Dr. h very careful TO
ported He made simple experiment with copper
ia thing which he placed in basin causing water TO be
thrown upon it, in explanation Of the principle Of the
fraction or light person standing at short distance
could the arthng at the bottom Of the basn but
when the water was poured on nc clearly saw 3,
strupepis then reverted to- and the lecturer at great
palms, and with much perspicuiy, went through some OF
the most interesting facts III natural philosophy The
logarthmc, tigonometrical mode OF calculation was
explained and made easy to tho simplest mind !;
explain The erratic nature Of the movements Of the
comets whit less successful Some Of his accounts Of
p,etc with interest and the soundest nformaton and
would necessarily take course OF ut least twelve lee
turts TO enable him 70 compile his full astronomical
information; and the public at least that portion
which have formed his audiences must regret that he is
permitted TO lead them through the vast and imta
bic field OF astronomical science on which he has YET
been scarcely able to enter having only crossed the
mighty threshold OF the geography OF the heavens in the
four beautiful predatory lectures which have been
Enthusiastically received.
During the whole Of these lectures, have observed
that there have been more apparently apprccave
audiences assembled in the Academy Of Mufc Dr. Cahi
was appaudcd to 81 tho very echo, thst did applaud
again. bu. yet order and deoorum were fully
maintained When, in calculation Of the won
derful mechanism of the human eye, and
the immense magnifyng power Of the telescope, ht
glasses seen snow in the north pole OF Mars-whte and
eistepng the ferceness Of s winters, and yciiowsi
IN the warmer seasons--there were numbers
impressed with great surprise and establishment The
wonders of the memory Of man were then very fully dis
cussed and the reverend gentleman concluded his able
lecture cordially returning thanks to his audience and
to the people Of New York for the very friendly and
pitahle In which he had been recsved BY them,
warmly rendering to the press Of this city his
Acknowledgements for the notices which their kind
ness he said had led them TO extend 70 him. He stated
his intention TO leave Immediately for the Souththen TO
Canadathen perhaps back to Ireand-then, he lives,
once more to return to Amcrics-when he hopes To
finish this Of lectures successfully begun Az
an example Of Dr.. Cahis popularity this continent
we may that he has already received Invitations
visit hundred and fourteen cities and towns. On
firing last night at the conclusion Of his lecture he
saluted with tremendous applause, and raising glass
wine to his lips he drank 70 the health the audience In
the midst Of applause loud hearty and unanimous which
can alone proceed from genuine and noble hearts.