New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1878-04-19

the AYES shoud occupy; others in totally OPPOSITE
dirion having eyes enormously developed rs Ta m
them, 10 see with The smallest modicum Of hght Ins u
true at DEPTHS OF 300 10 1,9OO latuOms, VI tha
s W shonId have produced Numerically 0p-
posite results The question is the InOIc Which
cause ID concerns very ola ig IA nor break M the
seas below the 1.000-iathOm me- nor ~ ,o,na
existing animals there This IS fauna tIae nas and
down without change OF locality since CretaceOus ad,
possibly since Jurassic eras New Orns lnVso o ,ron,
epochs may have been introduced by inla1Dms, tor
the coast and shallow water Of the continents put hee
can be little question that the dredge at great uepS
brings up chiefly the direct descendants OF the
Vi En- witch followed Professors Cope and
GIN both regarded the two lines % deyeiopme od oo
liberated and increased vision in animals AT grraC
depths as natural result OF the evolution hypoeeSs
Just in iacf what might expect 80 lar RON Dtik
nshed new argument In its favor. Professor Gu TOOK
the opportunity thank Professor Agassz lor TINS CV
conditions mad been vastly stimulated by the efforts OF
the elder and the younger Agtssll, Dy Oount AO4'''
and others of the Cambridge SCHOOL
THE SIZES OF MOLECULES.
DIR. Wolcott Gibbs delivered valuable essay, which
had more interest than would have been suspected rom
its title on "BOyle and Narcotics Law" The subJeet
was discussed entirely matter Of mathematics inc
point involved being as to what allowance should DC
made for the molecules OF gas in calculating us con-
traction under pressure the contraction applying ProDa
bly, TO the spaces around each molecue. and not 10
the molecules themselves Some OF the results are very
curious If that in hydrogen we nave nOtnlng
to deal with but the molecular and ntcrmoecnlar
spaces it will follow that in entire meter OF hydro
grn at pressure of o. and temperature OF A. O., the
molecular volume amounts TO 53S.0 CUBIC cenumcIIes.
I'm of aer words the molecules OCCUPY $50 mlonths
Of the Whole space Under a pressure OF one
atmosphere, cubic metre OF hydrogen IT,, contains ans
ton nitrogen TO hydrogen at the same temperature
and pressure for the ratio Oi volumes OF y as
that u.s. the volume OF the molecules OF nitrogen III one
cubic meter OF the gas Is 27 times as great as tne Vo
occupied by the molecules Of similar quantity OF
In tlp latter mt ~ ana enc atmOspntTe,
tile free path OF the molecules Is 418 times their IN
dyldual dameters in nitrogen, 1914 tunes. The di-
ameer OF an Of hydrogen to be expressed in cen
timctcrs by AZ divided by 10 raised to the nlntl
power an atom OF nTogen o. also dv kn , cs ~
with the results obtained through other lines OF research
drogen will In centimeters 5l2 divdedby 10 raisedt
the ninth power; nitrogen, 6O7 similarly divided rim
ally, Boyle and Narcotics law holds good TOR certain
limiting conditions Of pressure provided u be applied
solely the terstcd spaces and not to the molecular
matter OF gases. The essay gave full credit to otner
workers in this ded for some or the above ana Olhef ue
ductiOns.
OTHER ESSAYS AND PROCEEDINGS.
very long essay was read by Professor George
Davidson on the abrasous OF the Northwest Coast OF
America. 1t was chiefly occupied with a descrip-
ton Of the appearance Of the coast ranges and hills that
face tho Pacific from Mexico to Alaska Viewed colec-
lively they present series Of nattopped rocks, hills,
beaches and paeaus OF terraces cut into such general
shapes by an agency OF vide applcatlon Inc various
admitted agencies for Transforming me terrestrial
surface considered separately and shown 10 be
Inadequate for this result Professor DAVIDSON aSCIlDcs
it, in connection with the gradual elevation Of the coast,
10 "a great ice belt winch followed the shore line, and
performed this gigantic sculpture. General Benjamin
ord gave essay the intersection OF circles ana
spheres Il showed that ali the other angles OF inter
section might he deducted from OTihOgOnal or Ilght
au..d iutrTso Of one circle with three others.
At the business session OF the afternoon Professors
John he Coute and John TrOwb1dge were elected mem
beers. The number OF candidates proposed IS smaller
than m lu-t years mcetng but the contest Oy eec-
tOus is fully as prolonged We ~
AN ELECTION or OFFICERS.
WASHINGTON, April 1S.-At the meeting OF
the Academy Of to-day De- Gibbs and Professor
gard having positively declined reelection to
the Offices OF Yce-Prsdent and Home Secretary,
respectiyoly Professor o. c. Marsh, OF Yale College,
New.Iaycn, Conn.,, was elected Vice-Presldeut, and
Professor J. H. c. Coffin, of Washington, was
elected Home Secretary fer the ensuing six
years Members OF the Council Of lo7e-T9
were then elected follows: Professor g T. Baird. Dr.
WocOtt Gibbs, Professor A-aph Hall, Professor j. j..
Hl.arl General ". e. Mcigs. Professor simon New
comb The present officers OF the Academy are Joseph
Henry, Prcsiieut: .. c. Marsh, NicePres dent;
+. 4. p. Barnard, Foreign Secretary; Ill. {. Collin,
Home Secretary Rogers Farman, Treasurer, and the
Council above. At the scientific session Professor
NcwCOmb delivered lecture on plan for measuring
the velocity OF light He illustrated D5 remarks Dy ala
grams on tue blackboard, ana was listened 10 Win great
attention lie made many suggestions IN respect to The
best method OF determining this Important constant IN
ply sics and astronomy.