** How to Make a Finger Ring [39]

While the wearing of copper rings for rheumatism may be a foolish notion, yet there is a certain galvanic action

[Illustration:  Tools for Forming the Ring]

set up by the contact of the acid in the system of the afflicted person with the metal of the ring.  Apart from this, however, a ring may be made from any metal, such as copper, brass and silver, if such metals are in plate or sheet form, by the following method: 

All the tools necessary are a die and punch which are simple to make and will form a ring that will fit the average finger.  Take a 3/4-in. nut, B, Fig. 1, and drill out the threads.  This will leave a clear hole, 7/8 in. in diameter, or a hole drilled the desired size in a piece of iron plate will do as well.  Countersink the top of the hole so that the full diameter of the countersink will be 1-1/4 in.  This completes the die.  The punch A, is made of a piece of 5/8 in. round iron, slightly rounded on the end so that it will not cut through the metal disk.  The dimensions shown in Fig. 1 can be changed to suit the size of the finger to be fitted.

The metal used should be about 1/16 in. thick and 1-1/4 in. in diameter.  Anneal it properly by heating and plunging in water.  Lay it on the die so that it will fit nicely in the countersink and drive it through the hole by striking the punch with a hammer.  Hold the punch as nearly central as possible when starting to drive the metal through the hole.  The disk will come out pan shaped, C, and it is only necessary to remove the bottom of the pan to have a band which will leave a hole 5/8 in. in diameter and 1-1/4 in. wide.  Place the band, D, Fig. 2, on a stick so that the edges can be filed and rounded to shape.  Finish with fine emery cloth and polish.  Brass rings can be plated when finished.  —­Contributed by H. W. Hankin, Troy, N. Y.

** How to Bind Magazines [40]

A great many readers of Popular Mechanics Magazine save their copies and have them bound in book form and some keep them without binding.  The bound volumes make an attractive library and will always be valuable works of reference along mechanical lines.  I bind my magazines at home evenings, with good results.  Six issues make a well proportioned book, which gives two bound volumes each year.

The covers of the magazines are removed, the wire binders pulled out with a pair of pliers and the advertising pages removed from both sides, after which it will be found that the remainder is in sections, each section containing four double leaves or sixteen pages.  These sections are each removed in turn from the others, using a pocket knife to separate them if they stick, and each section is placed as they were in the magazine upon each preceding one until all six numbers have been prepared.  If started with the January or the July issue, the pages will be numbered consecutively through the entire pages of the six issues.