600 



Popular Science Monthly 



Arrangement of parts and connections for 

 Bunsen burner and blow-torch 



Bunsen Burner and Blow-Torch 

 Combined 



A COMBINATION Bunsen burner 

 and blow-torch can be made from 

 'jy-inch gas fittings. The cost should not 

 exceed $1. 



The following material is needed: 



Two tees, A. 



Five 1-inch nipples, B, C, 



One floor plate, D. 



One air-mixer from an inverted gas 

 burner, E. 



One air-mixer from an npriglit gas 

 burner, F. 



One straight valve, G. 



One "L" valve, H. 



One valveless hose connection, K. 



The fittings should be assembled as 

 shown. 



By careful adjustment of the air- 

 mixer, F, an intensely hot blue flame 

 twelve to eighteen inches long can be 

 secured. By regulating the mixer, E, 

 the usual Bunsen flame ma\' be obtained. 

 • — A. C. Fisher and J. B. Whittaker. 



Brass Tube Cleans File Teeth 



T 



V^ETH of a file clogged with lead 

 or other metals can be cleaned with 

 a short length of brass tubing. The file 

 should be held on edge and the tubing 

 forced along the teeth. Wedges will be 

 formed at the end of the tubing, which 

 will force out the metal which has 

 formed between the file t'^eth and thor- 

 oughly clean the file. — E. B. Williams. 



Cutting Glass Bottles and Tubes 

 with Oil 



TO cut a glass bottle or tube, fill with 

 lubricating oil to the level you 

 wish the vessel to be cut. Then heat an 

 iron rod to the point of redness and 

 slowly dip it in the oil. When the oil 

 gets hot, the vessel will crack round the 

 top of the oil, making a clean, even 

 break that can be dressed off on a grind- 

 tone. — A. E. Smith. 



A Coarse File for Soft Metals 



LEAD or other soft metals can be filed 

 with an ordinary flat file which is 

 annealed and cut along one edge with 

 sharp angular teeth. Afterwards, the 

 file should be rehardened. 



— E. B. Williams. 



A Trousers-Hanger 



THE pieces B, B\ B\ and B' are flat 

 strips of metal riveted to make 

 flexible joints. The rivet R is made with 

 a hole in its head large enough for the 

 rod to slide through and connect to 

 the rivet K, while C and O are clips to 



This trousers-hanger is easily made and is 

 more efficient than those which can be 

 bought at most stores 



hold the trousers, and are connected to 

 B and B' by flexible joints. The clips 

 slide on the rod O. The weight of the 

 trousers will be exerted at the point K, 

 thus pushing out the strips B and B' and 

 stretching the trousers. This appliance 

 is not only light and non-breakable, but 

 it is also easy to make. Every man 

 should welcome it. — Leo M. Lafane. 



