Home Science Stunts with Candles
WHAT ARE CANDLES MADE OF? Light a candle, and for an instant hold a sheet of white paper in the upper third of the flame. A deposit of black soot on the paper indicates that part of the candle consists of carbon. Next, hold a clean cold glass over the flame as shown by the drawing above. It will be found that a mist will collect on the inside, indicating that hydrogen is being burned.
Building Your Own Gasoline Station
By Fred T. Anderson
Gasoline can be obtained at the wholesale price only when a storage tank of 50 gals, capacity is available. With such a tank it is possible to buy directly from dealers at a cost usually about three cents a gallon less than the retail price.
Wow, I think they got ripped off. That’s $9661 in 2011 dollars.
Junior High School Students Build This Model Dirigible
FLYING on a swivel under its own power, this model dirigible shown above was made by members of a class in aeronautics in Hamilton Junior high school, Long Beach, California.
A vacuum cleaner fan and motor were attached to the model and propel it about in a circle at a rapid rate of speed. It was made of wood and metal at a cost of $750 to the school.
The model demonstrates the newly dis- covered principle of aircraft propulsion invented by F. Slade Dale. The rapidly revolving blades of a centrifugal fan whirl the air away from the bow center. This causes a partial lowering of air pressure at the bow and the atmospheric pressure on the rear portions of the ship drive it forward.
The miniature dirigible was built under the supervision of John Hodgson, former engineer and aviator, now an instructor.
Digging a Pirate’s Cave
By HI SIBLEY
WHILE excavating for a new house in the weed-grown lot next door, workmen unearthed a surprising maze of caves and trenches. Evidently they had been dug many seasons before because bushes and weeds were growing luxuriantly from the soil spread over the roofs. Considerable grading and no end of fancy language were required before the lot was in shape to build on. But it proved that a well-made cave is about as substantial a clubhouse as a boy can make.
FIVE years ago Harold Herd’s son Howard, now ten, asked his Dad if they could build a cannon at their Pasadena, Calif., home. They began making tiny models which actually fire and today they have a collection of artillery ranging from the year 1400 to the Civil War. The father-son team has been so successful that they have now found a ready market for them in kit form.
That’s some pretty extreme DIY.
Builds Plane in Parlor While Neighbors Wonder at Noise
THE mystery of all the pounding and sawing neighbors heard in the home of Peter Lepicer, of Brooklyn, N. Y., was solved when he moved a two-seated monoplane which he built in his parlor. Workmen were required to tear part of the building away in order to get the plane out of the house.
Easter Eggs Masquerade as Cartoon Characters
Easter eggs may be transformed into likenesses of cartoon and nursery-tale characters, with attractively colored cut-outs now available in book form. Each design provides both a base and a headpiece for a tinted egg, as shown, and the book contains materials for dressing up twenty eggs in different guises.
HOW TO BUILD A GEIGER-MUELLER URANIUM SURVEY METER
By F. L. Brittin, S.M.,I.R.E.
ANYONE can build and operate this simplified Geiger-Mueller survey meter, which is an instrument for detecting the presence of radiations emanating from radioactive substances such as valuable uranium and radium. Specifically, the Geiger-Mueller tube, which is the most important component of the instrument, detects X-rays, cosmic rays and gamma rays. Beta rays can also be detected by Geiger tubes with very thin cathode walls.
This is another one of those things that gets much better and cheaper with a digital camera. This poor guy only got one shot per launch and had to carefully time it so the kite would be at the right hight for the camera to be focused.
Even Google Earth is getting in on the act now.
KITE TAKES AERIAL PHOTOS
You don’t have to hire a plane and pilot to get good air shots of ground objects.
By E. J. Roy
FOR many years, the idea of making photographs from a kite has been in my mind. This year, I decided to do something about it. First was the kite design, and having had considerable experience with various types of kites, I finally selected a design for a triangular box kite with wings.
Alas, cats are not the same. I bought my cat a cardboard plane and he refused to ever get in it.
Coming Generation Is Growing Naturally Into the Idea of Flying
WASH tubs, wheel barrows, newspapers—in fact anything young children can lay their hands on—are being converted into transport planes, fighters and gliders of the queerest shapes and designs. Youngsters have accepted aviation as a permanent fixture and are preparing for it in their own way. Instead of playing policeman, cowboy or house, both boys and girls are pretending they are pilots, guiding a ship through the sky.