Popular Science Monthly
��How to Keep Rope from Raveling
AKE a |)icir of gas pipi' about i in long and just large onougii to slip ()\cr tile cmkI of tlu- rope and pull tlu' ropi' through the jengtii of the pipe.
Ill is is to get a tirni end in the jiipe. Cut off the surplus and then screw a stout screw hook into t h e renter of the rope inside the pipe.
This will expand the rope so that it is impossible to \n\\\ it out. By substituting a com- mon I -in. screw for the screw hook a rope end can be kept from raveling. — \.\CK Mn.i.ER.
��A short length of pipe
and a screw prevent
��Cutting Glass-Tubing by Electricity
TO cut glass-lul)ing of large diameter without breaking it, the following simple method is used. With a three- cornered file, make a deep scratch com- pletely around the tube. To have the two ends of the scratch meet and to ha\e a square entl after cutting, wrap a narrow strip of jjaiier with parallel sides around the tube and then draw file along the edge of (he paper. Take a short piece of iron wire about No. 14 or smaller, an d wind it once about the tube, so that it f.ills within the
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��Making a neat cut
��groo\-e. Fasten one end of the wire to the terminal of a storage battery and with the other end connect in series just enough cells to furnish current to heat the wire to redness. The sudden heat- ing of the wire coming in contact with the cool surface l)reaks the glass along the scratch and with a little care e\-en an inexperienci'd person may do efficient work. — \V. A. SiiEwn.vKi.
��Smoothing Cross-Grained Wood
REMOVE the cap (curling iron) from . a smoothing-plane. File the edge off squarely until it is 1/32 in. thick, instead of being sharp, as originally made. Replace the cap and set it very close to the cutting edge of the bit. I'his simple expedient will enable you to smooth any cross-grained wood or any wood against the grain, provided it is dry. — \Vm. C. Turtle.
Regulating Shower-Bath Water
THE use of a water-mixer will prevent the annoying spurts of hot or cold water which often occur in shower-baths. Its cost should not exceed seventy-five cents or one dollar.
/? is a cross in. by ^4 in. by in. by ^^ in. Hot and cold water en- ter at A and B. E and F are 2-in. by M-iri. couplings.
X is a 2-in. iron pipe.
/ is a piece of ^4 in. iron pipe, cut on a slant, as at il/. It is screwed through the coupling E and into the cross end. // is a i3<t-in. iron pipe, one end cap- ped at G, the other end cut on a slant at L. It is simply placed over pipe /. The outlet of the mixed water is at N. If it is desired to use steam and cold water the hot water inlet is plugged, the plug C removed, and the steam pipe connected there. The mixer is made throughout with ordinary^ iron pipe and threaded fittings. In actual use it is impossible for the water to be either too hot or too cold if the mixer is regulated as it should be. To insure efficient ser- \ice the mixer should be cleaned oc- casionally, preferably once in three months. This can be easil\' done by taking the apparatus apart. — Jasies E. Noble.
���For regulating a shower-bath