The morning call., 1893-10-22

snugiy down to the next plank DeioW with
the hammer, and fastening 1t upon each
frame as you go along with nails an lnch
apart, riveted inside. Having brought the
plank into place, bore hole through
plank and frame with fine gimlet-bit a
trifle smaller than the nail, drive In the
nail gently as far as the head, then sink
home both plank and nail. Ii the or
dinary boat nail IS used drive down
the burr with burr-starter and hammer.
nip off all but quarter OF an inch OF the
projecting end and rivet it down upon the
burr with a hammer. holding the set
against the head of the nail during the
operation.
A covering plank, or plank sheer, about
four inches wide, must now be laid around
the edge of the deck from stem TO stern.
The plank sheer covers the guIwale
streak. the pops OF the frames and the
ends of the beams. To lay the deck use
narrow-matched and grooved pine floor
ing, the planks laid straight fore and aft,
the outer ones being trimmed to suit the
curvature of the sides.
Every seam in hull and deck must be
securely calked with light thread of
oakum and fayed with hot pitch or red
lead. Every little hole or crack must be
stopped with red lead or putty. Then
paint the hull to suit your fancy.
The final operation is to fit up the boat
with rudder, cleats, stern iron, with stout
ring for mooring, iron horse for the main
sheet, and the spars, rigging and GAIL.
There, boys, we have told you all that
can be told on paper about building cat
boat Write US how you succeed.
ALUMINIUM AND STEEL.-T. j. F..
Cantoline, CaL-Steel which is a modifi-
cation of iron, is about twice as heavy as
aluminium. In the manufacture OF
IL, I'll, oOt
take the place of steel. Aluminium is
very ductile and elastic. 1t is used princi-
pally in alloys and sometimes alone,
where lightness accompanied with great
strength is necessary; it is tougher than
steel, bar of aluminium would DC
stronger than one of steel of the same size
1t cannot be tempered. 1t does not tar
nish or rust. in the air; 1t is softer than
steel; by hammering in the cold II becomes
about as hard as soft iron, but may be
soitened again by fushion. 1t is manu-
factured at Lockport, n. y, by b. ID.
A. II. Cowles, but the process OF separat'
ing it (Which is done by electricity Is
such an expensive one as somewhat to
prohibit the extensive use OF the metal
alone. There are several alloys in use IN
the manufactures. That with copper, the
original aluminium bronze, IS hotlctably
proven at from 81, 1853 pounds to 114,514
pounds to the square inch, with elastic
limit ranging from 59S15 to S5.034. We
cannot give prices per ton or say II II
could be obtained in such quantities. Ii
sells in the East in bars for the manufac
ture of horseshoes at about 81 per pound
ALBUMENIzED PAPER-M. H., City
From all we can learn by inquiry am ong
photographers and dealers in photog.
raphers' supplies. the albumenized paper
is made in Germany by a process known
only to the manufacturers. IL can be
bought of any dealer, and photographer:
who use it are not accustomed to prepare
it themselves. The operation of making
the solution and applying it to glass is a.
follows: The whites of five fresh eggs are
mixed with about one hundred grains o
potassium iodide, about twenty grains o
potassium bromide and ten grains o
common salt. The mixture is beaten u