Inflating Toy Balloons With Gas From the City Mains (Jul, 1930)

Inflating Toy Balloons With Gas From the City Mains

GAS from the city mains can be used to inflate toy balloons with the simple inflating device shown in the drawing above. Gas as it comes out of the ordinary jet has only a pressure of a couple of pounds behind it, which is quite insufficient for inflating purposes.

Traveling Woodworking Shop Tours Schools (Nov, 1938)

Traveling Woodworking Shop Tours Schools

Making the rounds of schools and playgrounds in Pasadena, Calif., is a complete woodworking shop on wheels. Built on a truck chassis, it includes a circular saw and band saw, lathe, electric drill and small planer. Its power is taken by a long cord from the regular 110-volt circuit of whatever school ground the truck visits. It is equipped for model building and for teaching handicraft work in schools lacking workshops of their own.

America’s Five Favorite Hobbies (May, 1941)

America’s Five Favorite Hobbies


AMERICA is the hobby center of the world. More money is spent annually on hobbies in the United States than in any other country on earth. From old-fashioned whittling to polarized-light microscopy, a thousand and one spare-time interests provide Americans with relaxation and amusement. Seeking relief from the strain of an uncertain future, millions of persons, in recent months, have joined the ranks of the hobby-riders.

Supplying the needs of America’s vast army of hobbyists has become big business. Factories with incomes of millions of dollars annually cater to the wants of men and women who are following specialized hobbies. Each week sees an increasing number of hobby columns in newspapers and hobby volumes on the shelves of libraries and bookstores.


ROCKERLESS ROCKER is rigged with two metal strips, wheels for passing time.

Build this Basketball Scoreboard for your Gym (Jan, 1933)

Build this Basketball Scoreboard for your Gym

Spectators at your school or club basketball games will get a bigger kick out of the battle if they can keep an eye on this electric scoreboard, which tells at a glance how the game stands and how much time is left to play. Take the idea to your coach— he’ll welcome it.


THERE is a distinct advantage, from the spectators’ interest standpoint, In having a scoreboard controlled directly from the officials’ table, so that the official score and time left to play can instantly be flashed before the spectators as the game progresses.

The electric scoreboard described in this article is operated by means of a control box from the officials’ table and the score, and other information, is flashed on the board by means of sections of lamps, certain sections of lights in various combinations making up the required number to indicate the score, whatever it may be.

Remarkably Lifelike Little Dogs made from Pipe Cleaners (Apr, 1933)

Remarkably Lifelike Little Dogs made from Pipe Cleaners

You have probably seen amusing little animal novelties made by twisting pipe cleaners together, hi most cases they are comical enough, but stiff and grotesque— almost childish. It is therefore a revelation to see, from the illustrations accompanying this article, what lifelike results can be obtained by one who is skillful at this pastime.—The Editor.

A Home-Built Miniature Motorbike for Youngster (Jan, 1933)

A Home-Built Miniature Motorbike for Youngster


A youngster will get some keen thrills out of driving his own specially designed midget motorbike along the highways at a clip of 40 m.p.h. Read this article to learn how to build one of these miniature jobs or cut down a big machine to make it suitable for a 10-year-old boy.

AN EXCEPTIONAL opportunity for the mechanically-minded person to exercise his ingenuity and creative ability is afforded in the construction of miniature motorcycles for youngsters ranging all the way from three up to eight or ten years of age.

When complete, these tiny motorcycles operate exactly like their larger brothers, which may be seen in the hands of sportsmen and motorcycle policemen. The tiny engines propel the little machines along at 35 or 40 miles an hour, yet are easily controlled at a twist of the wrist by regular motorcycle throttle and spark grip.

An Electric Miniature Mono-Railway (Feb, 1931)

An Electric Miniature Mono-Railway

IT IS a well known fact among experimenters that when a whirling gyroscope is set in an upright or inclined position it will not change unless some strong exterior force is applied. Due to this peculiar quality, which is known as the precessive effect, the gyroscope can be utilized in the construction of many scientific instruments and practical devices which are used in every day life.

One of the most important uses to which the gyroscope is put is that of keeping a mono-rail train in an upright position as it speeds along on its single track. The most practical and outstanding railway of this kind is known as the Brennan Mono-railway, which is used in Ireland.

Model of Rome Took Thirty Years to Build (Jun, 1934)

Model of Rome Took Thirty Years to Build

After more than thirty years of work, a French architect, Paul Bigot, has completed a stupendous task, the building of an accurate relief map of Rome as it was about the fourth century, A.D., when the city was at the peak of its power. At that time Rome was the center of as much of the world as was then known. It had gathered the riches of conquered countries and was crowded with temples, palaces, shrines and stadiums.

Builds Organ of 550 Pipes in a Garage (Dec, 1938)

Builds Organ of 550 Pipes in a Garage

Using his garage as a workshop, and giving only his spare time to the task, H. T. Adams, of Ham, Surrey, England, built the 550-pipe organ shown in the photograph at the left. Although Adams, an automotive engineer, had had no previous training in the work, he constructed every part of the twelve-foot-high organ himself, except the metal pipes. The only plans which he employed were those to guide him in assembling the intricate mechanism of the console.