The New York herald., 1878-03-24
THE LECTURE SEASON.
MIR. CURTIS COURSE OF LECTURES.

MR. CURTIS COURSE OF LECTURES.
Mr. George Ticknor Curtis, the eminent jurist and
historian will deliver the first OF Of three
lectures selected topics Of American constitutional
and political history, at Association Hall, Tuesday
evening" March 20. Mr. Curtis afiuence OF informa-
ton on this class OF subjects, aud his
great competence 10 inpart interest as well
as instruction, make this rare
sion for all who wish 10 acquire knowledge
freshen their previous knowledge OF transactions
OF which no intelligent man, and, least OF all, any
American citizen, would like to confess ignorance.
The first lecture OF this interesting series will
be devoted 10 the history OF the treaty
OF peace by which our independence was ac-
knowledged. including the state OF parties in
England and personal sketches and anecdotes OF
the famous statesmen OF the period-Engllsh and
Amcrican-incuding George Ill, Lords North, Shell
burnc and Rockingham the great orators Fox. Burke
and Pitt tho Comte de Vergennes OF France and
Franklin Jay and John Adams among tho Ameri
cans subject of much interest handled by
such man Us Mr.. Curtis ought to draw large au-
dience.
PROFESSOR A. CARY SMITH ON NAVAL ARCHI-
TECTURE.
At Deimonco's last evening Professor A. Cary
Smith delivered the sixth and last OF his OF
lectures before the Seawanhaka Yacht Club. His
subject was 'Altefatiops," ana it was atientively
listened to by the large number Of present
Professor Smith said that alter completing tho
drawing of the vessel as bad shown IN the fifth
lecture, making the various calculations and com
parlng them with the performances Of other and per-
feet vessels parison is then made with the known
performance OF the vessel in question. Alter deciding
In what way she has failed 1t is dc.
sired 10 ascertain how much 10 lsngthen and
II heightened what effect II VIII have. A
boat when heightened should be raised, or she will
not get her maximum stability before the deck is
un der water. Late experiments show that the skin
resistance the most important thing whore speed
in light Winds is expected Tho length OF
the forward body cannot exceed the after
body stern more than certain percen tage;
that Is, = vessel may have q bow suited 70
speed of ten mics hour, while the stern Is only
suited to speed OF eight miles AN hour. When this
10 the caso and II is very often the case the vessel
only be driven to the lower rate OF speed, which
explains why SO many vessels tail in performance
that line bows aud we'll spared; have 1ue
runs, and siii do not come up 10 expectations
Speed depends on all the parts being harmonious.
Bows.
Iu light weather the increased hneness OF tho bow
is OF use, and IN gong to windward OF very little
use at any time To prove take sloop Undlne,
a wonderful boat to windward. especially IN strong
winds, having iuii forward line but very little hare
with the dead 1at frame about the middle OF the load
line. The old oracle was also iuii forward and had
NO aaro the same being so with the old White Wing
stem Is rakcd TO give good outline, and then
the same deck limo Is used that would be put on
plumb stem. This gives great Hare TO the bow TIM
Dor; baa inclined line, and consequent failure in
strong winds When this formed bow sriIos wave
with the angle OF inclination added 10 fare of the
bow, IL IS almost 1at ana comes down Win great
lence rs raised again by the pressure o the water
the Nat surface, and the boat falls to leeward. This
form Of boat Is often spoken oi as ory. No water
comes beard. That may De, but u Is at the ex-
pcnss OF speed. Neither the Sappno Magic, Comet
nor Arrow have much fare; neither thoy fun nor
a re
After comparing the clem0uis oil boat with those
oil known performance ana general excellence, tne
Professor sad :"Make cy indroid curve oil The old
boat, or II no table oil areas oi circles is at hunu,
put down the OF The sections IN linear feet al
tho Intervals that the calculations have been made 10,
and pen a batten around The points. II there Is any
Mark the proposed addition TO the length and
carry the curve lair out 10 The end; mark
the Intervals ON tho now curve the
same distance the Old and have
n. the area OF each section. and from these the
Calculations for displacement and the centre OF buoy
ancy are made. THIS zone, compare them with s0me
known Ooat aud u they accord or SUIT our ideas Of
what is wanted 10 be accom pisned then po on. Now
lay down load water Inc, make the outline OF The
keel and stem aud put la tho new sections taking
10 make the areas coincide with the oi
Next lay down inclined water line OF ii cen
degrees aud II unfair curve Is shown II
taken of at this place. Do not be afraid to do this,
for The water Inc was rlgnt The bow out Of water
must correspond, or u portion oil our trouble Will be
useless. The prncii al aim OF bow Is not TO make
gooa spread TO rigging. II The width not enough
al this point Is easy to put on Channels AS almost
better than u wide nsred bow, aud bear mind tho
wide bow Weighs more, is no support, as II Is out Of
water, and II reaucss tie speed wnen gong Tree.
Tne lecturer then spoke about ''laying up' and
getting ready Ior spring, and gave some Interesting
iDfoTmatio 10 yachtsinen.