ile and charcoal
should not exceed $2 in cost.

** Cadmium and Solder [421]

The addition of cadmium to soft solder composed of tin and lead,
lowers its melting point and increases its strength.

** Telegraph Codes [422]

[Illustration: Telegraph Codes]

** How to Make a Cruising Catamaran [423]

A launch is much safer than a sailing boat, yet there is not the
real sport to be derived from it as in sailing. Herein is given a
description of a sailing catamaran especially adapted for those
who desire to sail and have a safe craft. The main part of the
craft is made from two boats or pontoons with watertight tops,
bottoms and sides and fixed at a certain distance apart with a
platform on top for the passengers. Such a craft cannot be
capsized easily, and, as the pontoons are watertight, it will
weather almost any rough water. If the craft is intended for rough
waters, care must be taken to make the platform pliable yet stiff
and as narrow as convenient to take care of the rocking movements.

This catamaran has been designed to simplify the construction,
and, if a larger size than the dimensions shown in Fig. 1 is
desired, the pontoons may be made longer by using two boards end
to end and putting battens on the inside over the joint. Each
pontoon is made of two boards 1 in. thick, 14 in. wide and 16 ft.
long, dressed and cut to the shape shown in Fig. 2. Spreaders are
cut from 2-in. planks, 10 in. wide and 12 in. long, and placed 6
ft. apart between the board sides and fastened with screws. White
lead should be put in the joints before turning in the screws. Cut
the ends of the boards so they will fit perfectly and make pointed
ends to the pontoons as shown

[Illustration: Details of the Pontoons]

in Fig. 3, and fit in a wedge shaped piece; white lead the joints
and fasten well with screws.

Turn this shell upside down and lay a board 1/2 in. thick, 12 in.
wide and 16 ft. long on the edges of the sides, mark

[Illustration: Completed Boat]

on the under side the outside line of the shell and cut to shape
roughly. See that the spreaders and sides fit true all over, then
put white lead on the joint and nail with 1-3/4 -in. finishing
nails as close as possible without weakening the wood. Slightly
stagger the nails in the sides, the 1-in. side boards will allow
for this, trim off the sides, turn the box over and paint the
joints and ends of the spreaders, giving them two or three coats
and let the