Popular Science Monthly 



311 



T 



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. 



•I 



A short length of pipe 



and a screw prevent 



rope raveling 



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 



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. 



1 '' 



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 



