120 



Popular Science Monthly 



A Non-Spillable Funnel 



Al' U N N E I. 

 \v h i c h will 

 cease flowing 

 automatically 

 when the vessel 

 nto which the 

 1 i Cj u i d is being 

 poured reaches a 

 certain height, can 

 be devised by at- 

 taching a metal 

 float to the 

 tapering funnel-tip. The 

 lloat is a small metal 

 cylinder closed at both 

 ends. Small brass tubes 

 should be soldered on 

 opposite sides of the 

 float, as indicated in the 

 drawing. Nails which 

 will fit loosely in the 

 tubes should be soldered 

 at their points to the tip 

 of the funnel, with the float in place. 



When liquid is poured into the funnel, 

 it will flow past the float until the vessel 

 is nearly filled, whereupon the float will 

 rise and check the funnel's discharge. 

 The tunnel can then be withdrawn 

 quickly, so that little or no liquid is lost. 

 It is also advisable to use a funnel 

 with a widely diverging rim to take care 

 of the overflow. When the float is 

 sutldenly pushed up against the spout 

 the liquid begins to rise in the funnel, 

 making this necessary. 



A Dark-Room Lamp 



VERY handy 



dark-room 



lamp can be made 



from a cigar bo.\. 



After tearing off 



the cover, cut a 



hole in one end 



just large enough 



to allow it to be 



sli|)ped o\er an 



electric light bulb 



and porcelain receptacle. Paste ruby 



paper over the opening. .\ fifteen-watt 



lamp will not be too bright. 



When the room is to be darkened, this 

 is put over the light. When not it is sim- 

 ply left off, Witli this, one (an get along 

 with (jne light in the developing-njom. 



A' 



l\ fu 



A Handy One-Drop Oiler 



■AiV use- 

 1 oiler 



'W 



made from 

 materials to be 

 found in nearly 

 every bo.K of odds 

 and ends is here 

 shown. 



The oil con- 

 tainer is a dust 

 cap from an old automobile tube. .A 

 >^-in. plug is cut from an old \alve-stem 

 and a washer fitting this plug is soldered 

 to it at the center. A si.\-penny nail 

 which will fit the hole in the plug is 

 soldered in place and flattened at one 

 end. A leather washer should be made 

 for the plug and the oiler is ready for 

 use. This oiler will be found handy 

 around the house as well as 

 garage. — F. W. Nunenm.^ciiicr. 



in the 



T"J 



Rubbing in the Lathe 



IE writer had 

 a number of 

 pieces of cast-iron 

 to be filled with 

 machine filler after 

 which they were 

 to be rubbed 

 smooth and flat. 

 Rubbing by hand 

 was slow and 

 the surfaces hard to flatten. 



The cut shows the fixture used for 

 rubbing; it worked \ery successfully. 

 The shank .1 Fig. i, is lu-ld in the chuck 

 of the lathe and the face B, turned flat. 

 To the face B, a piece of coarse emery 

 cloth is gluetl and the "rubber" rexoKed 

 at a fairly high speed. The work is 

 held by hand against the re\'olving 

 "riibl)er" until the desired results have 

 been obtained, after whith lhe\- are 

 finished by hand, rubbing with fine 

 emery cloth. 



After the emer\' cloth has been glued 

 to the "rubber," it should be placed lace 

 downward on some flat surface and 

 weighted down. The kind of work for 

 which this fixture was used is shown in 

 Fig. 2. 



The bed nl the lathe should be covered 

 to keep the emery awa\- from the bearing- 

 surfaces. — C. Aniji:ksi)n. 



