or get it made without difficulty; yet he who is able
to make things for himself will always have an advantage over the person to
whom the use of tools is an unprobed mystery.

CONTENTS.

I. SAWING TRESTLE
II. A JOINER'S BENCH
III. A HANDY BOOKSTAND
IV. A HOUSE LADDER
V. A DEVELOPING SINK
VI. A POULTRY HOUSE AND RUN
VII. A SHED FOR YOUR BICYCLE
VIII. A TARGET APPARATUS FOR RIFLE SHOOTING
IX. CABINET-MAKING
X. TELEGRAPHIC APPARATUS
XI. A RECIPROCATING ELECTRIC MOTOR
XII. AN ELECTRIC ALARM CLOCK
XIII. A MODEL ELECTRIC RAILWAY
XIV. A SIMPLE RECIPROCATING ENGINE
XV. A HORIZONTAL SLIDE-VALVE ENGINE
XVI. MODEL STEAM TURBINES
XVII. STEAM TOPS
XVIII. MODEL BOILERS
XIX. QUICK-BOILING KETTLES
XX. A HOT-AIR ENGINE
XXI. A WATER MOTOR
XXII. MODEL PUMPS
XXIII. KITES
XXIV. PAPER GLIDERS
XXV. A SELF-LAUNCHING MODEL AEROPLANE
XXVI. APPARATUS FOR SIMPLE SCIENTIFIC EXPERIMENTS
XXVII. A RAIN GAUGE
XXVIII. WIND VANES WITH DIALS
XXIX. A STRENGTH-TESTING MACHINE
XXX. LUNG-TESTING APPARATUS
XXXI. HOME-MADE HARMONOGRAPHS
XXXII. A SELF-SUPPLYING MATCHBOX
XXXIII. A WOODEN WORKBOX
XXXIV. WRESTLING PUPPETS
XXXV. DOUBLE BELLOWS
XXXVI. A HOME-MADE PANTOGRAPH
XXXVII. A SILHOUETTE DRAWING MACHINE
XXXVIII. A SIGNALLING LAMP
XXXIX. A MINIATURE GASWORKS

THINGS TO MAKE.

I. A SAWING TRESTLE

A strong and stable sawing trestle is one of the most important accessories
of the carpenter's shop, whether amateur or professional. The saw is
constantly being used, and for it to do its work accurately the material
must be properly supported, so that it cannot sway or shift. Anybody who
has been in the habit of using a wobbly chair or box to saw on will be
surprised to find how much more easily wood can be cut when resting on a
trestle like that illustrated by Figs. 1 to 3.

The top, a, of the trestle is 29 inches long, 4 inches wide, and 2 inches
thick. At one end it has a deep nick, to serve much the same purpose as the
notched board used in fretworking; also to hold on edge such things as
doors while their edges are planed up. Pushed back against the wall the
trestle is then "as good as a boy."

[Illustration: Fig I.--Leg of sawing trestle (left). Trestle seen from
above (right).]

The four legs are made of 2 by 2 inch stuff. To start with, the pieces
should be 24 inches long, to allow for the waste of cutting on the angle.

Cutting the Notches.--Make four marks 7 inches from the four corners of
the top, set your b