The New York herald., 1878-01-13
THE LECTURE SEASON.

The nrst OF series of lectures naval arehitec.
ture was delivered last night at pelmonicos, before
the members OF the Seawanhaka Yacht Club and
their friends, by Mr. A. Carey Smith, tho we'll known
artist and naval architect To simplify the subject
under discussion Mr.. smith had large plan drawn.
which Illustrated all the lines ana curves that are
formed in the construction Of model He first alluded
TO the sheer pan as 1t IL the outline OF the vessel
aud then the oadwator line always referred to l..
W. L.. which in this particular plan base lino
and ON account oil the difference OF draught of water
all measurements taken from IT, Calling attention
10 the plan, Mr.. Smith thon pointed out the waller
lines, the cross scctions lramcs tho stem,
the keel, tho sterppost the couatsrstern, tho
plank sheer, the rail, the section lines, tho
rab0et line and the diagonal lines Speaking Of
tho rabbet line he said, IL will be observed, IL is the
lower edge Of The rabuet in the Kecl forward edge OF
the rabbet IN the ster and aer edge oil tho rabbetat
the stern post He then alluded the breadth plan,
the lines OF which were lcttered the the sheer
plan. These lines represent width only. Tho base
line on this plan s the line of tue vessel aud
all measurements taken from II. Alter showing
the means to end the line, botn toro att the
lecturer snid:-The section lines in this plan are
straigh. iines parallel to the centre ine where
they The water lines IN the sheer plan squared
down 10 half breadth plan. They must make point
The line that more closely approaches square with
The surface Is the governing ne For this the
Is more used ait IMAM forward In tho body
plan The lines are lcltered as before All the frames
aead fiat in the nalbreadth plan put the right
side alt ot thai frame lbe lett side.
The deanat frame also known the greatest cross
scctiou Mr. Smith, alter explaining how TO obtain
tho frames, resumed. In his plan the section lines
appear straight lines, The same Ms the halbrcadth
plan; The water lines straight, tho diagonal nnes
straight, while the frames curved lines.
We now transfer the height of section
line in this plan 10 the sheer plan
ami wo nnd that they are alike. As tho
section lines govern the water lines IN the half
breadth plan they do the frames IN tho body pan
therefore both must DO fair curvek ln this plan The
huf siding 0 the keel at each frame. the hall siding
oil the aud the stern post are shown. We win
assume that The section limos have been all
proved and found correct
BuL want 10 make more searching trial and
this brings to the diag0nals. These lines
Jccted In the body plan diagonal ~ the centre ihe
abrupt OF the frames ana midway between the
water lines ana section limos. The measure
mcnts taken at each frame at the lntersec-
ton oil the diagonal and transferred to the
u base line ana the measurements are set up from
II frame. The ending forward Is the hoght
lin the body plan oil the diagonal at the side of Tho
transferred to the sh0cr plan at the rabbct anc
squared tho lowest water line. The diagonal
measurement at The same place tho body plan gives
Tho width. The alter lines ended In the same way
except wnere The dia. .ona crOsses the stern, the
height is taken before ana transferred to the sheer
pian At tho stern ana squared down This gives tho
width where the diagonal crosses the stern In this
perfectly lair. MIR. Smith continued his remarks Tor
some time longer, explaining on the black board
the different lines and curves drawn in the plan.
The lecture was thoroughly eDjoyed by the members
of The club, many OF whom were delighted at this
opportunity to improve their knowledge Of naval
architecture