Popular Science Monthly
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��joint line run the lines up until the same numbered lines cross each other. Mark with crosses and connect with a curved line as indicated in the illustration, and the pattern is complete.
In the development of problem Fig. 3, the steps taken are exactly the same as the foregoing; in fact all the problems in this article and the previous one are based on the same principles, the only difference in method being the two new steps involved in the problems in this article.
In problem Fig. 4 we have the same principles and method with a little dif- ferent application of one of the new steps. Draw the front and end view locating the joint line; develop the pat- tern for the small pipe as previously explained. When we come to develop the hole in the large pipe we will find that two extra points X — Y will be needed on the bottom view to indicate where point 3 of the large pipe comes in contact with the small pipe. We know that this point 3 will cause a change in the pattern of the small pipe in two places somewhere between points 1 and 2, also between 2 and 3; the exact dis- tance can be found by measuring the space on the large pipe.
��Proper Care of Shoes to Make Them Wear Longer
IT is possible to take such good care of your shoes that they will wear twice as long and look well to the last minute. In the first place, buy shoes that fit properly. Well fitting shoes will always outlast shoes that are either too tight or too loose a fit.
Remember that patent leather shoes and light weight footwear are not in- tended for hard service and consequently will not withstand rough wear. Be fair to your shoes and do not expect of them what they were never designed to give. All patent leather is likely to crack and no guarantee against this is made by the manufacturers of shoes. When the shoes are wet, be careful in drying them not to place them too near the fire, as they will dry out too quickly. This takes the life out of the leather and destroys its durability. Therefore, do not attempt to dry your shoes too quickly when
��they are damp. If your shoes are cleaned and dressed with proper dressing, they will wear twice as long. To keep them soft and pliable, there is nothing better than "neatsfoot" oil, which is in- expensive and can be bought at any leather or harness store. This oil is not a patent preparation, but is an oil that is used extensively by all harness makers to keep their goods in fine condition. Applications of this oil, say once a week, will keep the leather pliable and wear- resisting. — W. S. Standiford.
���Shape of tape and man- ner of attaching to glass
��Attaching a Cord to the Glass of Nose Spectacles
FOR a time I used a pair of borrowed nose glasses which had no hole for a cord, and fear- ing they would fall off and break I at- tached a cord temporarily by using a piece of adhesive tape. The tape was cut as shown and stuck to
one glass, holding beneath it the loop of
the cord. — James M. Kane.
How to Engrave Your Name on Steel or Iron Tools
TO engrave your name on steel or iron tools, melt some paraffin wax in a tin can, old saucer or other suitable con- tainer; take a brush and coat the surface with the wax, then let it cool. When the wax hardens, draw the design or name on it with a scriber or other sharp instru- ment, taking care that the sharp point of the scriber goes through the wax and bites or scratches the metal underneath the wax. Then take a fountain-pen filler or a hard wood stick whittled to a point, and dip it into nitric acid, letting the drops penetrate through the name or design on the wax.
Be sure to cover all of the name with the acid, letting it remain on the metal for about five minutes, so as to get deeply-cut letters. Rinse the acid off with water, and heat the metal until the wax melts; then wipe it dry.
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