90 



THE WORLD'S ADVANCE 



Boat Propelled by Foot Motor 



Although boats propelled by "man 

 power," which is applied through any 

 other form than oars and paddles, are 

 not relatively efficient, they are a distinct 

 novelty and afford a great deal of 

 entertainment. The driving mechanism 

 will depend entirely upon the resources 

 of the constructor; ordinarily, discarded 

 parts from old bicycles, a couple of sec- 

 ond-hand cogs, and the shaft and pro- 

 peller from a worn-out motorboat, will 

 be sufficient. Pains must be taken in the 

 design, so that the parts will co-relate 

 with the general proportions of the 

 anatomy of the man who is to do the 

 work of propulsion. 



Contributed by 



CARL HANCOCK. 



Holds Strainer Cloth in Position 



An improvement over the old method 



of fastening 

 the strainer 

 cloth which 

 is used for 

 straining liq- 

 uids by bind- 

 ing it along 

 the edges 

 with cord is 

 suggested in 

 the adjacent 

 illustration. 

 Small clothes 

 pins will do 



the work equally as well and are easier 



to handle. 



Contributed by 



B. W. VERNE. 



Ideas submitted for this department 

 are paid for at space rates when pub- 

 lished. 



To Renew a File 



Old files can be renewed by a thor- 

 ough cleaning with a fine wire brush, 

 followed by a bath in dilute sulphuric 

 acid. 



Contributed by 



JOSEPH MISKINIS. 



A Pipe Scraper 



A pipe which is covered with dirt or 

 grease can be 

 cleaned with 

 an old spade 

 which has 

 been ground 

 out to fit the 

 diameter of 

 the pipe. The 

 method of 

 using the 

 spade is 

 shown in the accompanying sketch. 



Contributed by 



B. W. VERNE. 



A Labor Saver for the Washerwoman 



The heavy task of emptying the water 

 from a wooden washtub can be obviated 

 by boring a small hole in the bottom of 

 the tub near the edge and fitting it with 

 a wooden plug. 



Contributed by 



R. D. SOUTHERN. 



Emergency Repair for Stuffing Nut 



A worn packing nut can be repaired 

 temporarily by driving a taper mandrel 

 into the center, so that the threads of the 

 nut will expand sufficiently to again fit 

 tightly. 



Contributed by J. N. BAGLEY. 



