The ancient Egyptians were the first to accurately measure the length of the year. They knew that the best time for sowing is immediately after the Nile...

An electroscope for detecting electrified bodies may be made out of a piece of note paper, a cork and a needle. Push the needle into…

We sometimes call valuable metals, such as platinum and gold, precious metals. Platinum is the most valuable metal in the world. It is called a…

Throughout history, armies and navies have sent messages across battlefields. Simple orders like “Advance” or “Retreat” could be given by bugle calls or cannon-fire. But…

A strong and substantial easel may be made at home with very little expense and no great difficulty. Smooth down with a plane, four pieces…

1.You need: 2.Make a hole in one end of the box. Cut two slits in each side.3.Draw round the end of the box. Cut out…

Outdoor Water Filter - How to Make a Water Filter - The Barrel Filter - excerpt from the book "The Scientific American Boy" by A. Russell Bond

A home-made toy railway – It is often thought that a toy railway is beyond a boy’s ingenuity to construct, whereas, in reality, it is…

Lay out the form of the capital letter Q with coins on a table and ask someone in the audience to select a number and…

Excerpt from the book:MOTHER’S’  REMEDIESOver One Thousand Tried and Tested Remedies from Mothers of the United States and Canada.By DR. T. J. RITTERPUBLISHED BY G.H.…

What is an electromagnet and how does it work? An ordinary bar magnet has a magnetic field around it all the time. We call this…

The Paper Pinwheel shown in Fig. 1 is one of the best whirlers ever devised. A slight forward thrust of the stick handle upon which…