286 



Popular Science Monthly 



upper and lower ends with a cross-piece, 

 and a slot is cut in the lower part for the 

 bolts. One edge of the lower part on each 

 standard is notched or cut like teeth on a 

 rip-saw. These are for holding the lower 

 ends of the adjusting pieces for the drawing- 

 board. A ^-in. hole is bored in the upper 

 part of each lower standard 6 in. from the 

 top for the bolts. The top is finished with a 

 board to make a lamp-shelf or a place for 

 data sheets. 



The rail 24 in. long is cut to make a 

 round pin on the end about ^ in, in 

 diameter, and a y^-in. hole is bored in each 

 upper support 10 in. from the top to receive 

 the pin. On this rail a board is fastened so 

 that a small box may be made on the rail 

 above it to hold pencils, penholders and ink. 

 One edge of the drawing-board is fastened 

 to the lower edge of the board to make the 

 whole into one built-up piece, forming a 

 notch above the drawing-board to hold the 

 drawing outfit and rules. 



The finish may be as elaborate as de- 

 sired; but for this stand a good stain was 

 applied, aftersmoothing all surfaces with fine 

 sandpaper.^ Then a good coat of wax was 

 given instead of varnish. — N. J. Parker. 



Enlarging Wooden Pulleys by 

 Building Up the Face 



WHERE wooden pulleys are used on 

 the main shaft and more speed is 

 desired of one or more machines, it is not 

 necessary to purchase larger pulleys. If 

 a 10 in. pulley is in use and one 12 in. is 

 wanted, simply nail cleats, i in. square and 

 as long as the pulley is wide, completely 

 around the pulley face. Then lengthen 

 the belt accordingly and start the ma- 

 chines. The increase in speed will more than 

 pay for the trouble. — Edwin R. Mason. 



Vasettes Made of Copper Plate, 

 Wire and Test-Tube 



THE vasette shown can be easily made 

 by any one who has a ball peen-ham- 

 mer, a small hand-drill and a vise. The 

 base is cut from No. 16 or i8-gage copper 

 in any shape, such as a clover leaf, heart, 

 circle or trapezoid. The base shown here 

 happens to be a trapezoid design, the long 

 side being 4 in., one short side 2 in. and 

 the other side 3 in. It is shaped with the 

 ball-end of the hammer to give the custom- 

 ary beaten efTect. The center may be 

 raised or not as desired. After it is ham- 

 mered it should be gone over with a file and 



emery-cloth and all sharp edges and corners 

 removed to prevent its scratching the 

 furniture. The container is a test-tube 6 in. 

 long and ^i in. in 

 diameter, which can 

 be purchased at any 

 local drugstore. 



The standard is 

 of 3/16 in. copper 

 or brass wire 12 in. 

 long, hammered to 

 match the base. 

 One end is flattened 

 and two i/i6-in. 

 holes drilled in it 

 about ^ in. apart. 

 The standard is 

 then bent in the de- 

 sired shape around 

 an iron rod or pipe 

 the diameter of the 

 tube, afterxwhich it 

 is placed on the 

 base and centered. 

 Two corresponding 

 holes are drilled in 

 the base, and then 

 it is riveted. The test-tube is put in place 

 and the wire straightened up at right 

 angles to the base. Care should be used 

 not to crush the tube during this opera- 

 tion. — Francis W. Nunenmacher. 



Test-tube mounted 

 in copper wire stand 



Avoiding the Dust from Ashes in an 

 Old Furnace 



TO prevent the discomfort arising from 

 the flying dust of coal ashes when 

 handling a hot-air furnace in a house, the 

 introduction into the ash pit of a perforated 

 pipe connected with some convenient 

 source of water supply, and controlled by a 

 valve outside the furnace casing, is a great 

 convenience, and nei- 

 ther diilficult nor expen- 

 sive to instal. 



The pipe should be 

 of black wrought iron 

 and the perforations 

 should not be over 

 l/i6in. in diameter. 

 For the ordinary 

 ash pit ^2 in- pipe, 

 perforated about 2 

 way as to spray the 

 greatest amount of floor space, will be satis- 

 factory. The accumulated ashes should be 

 sprayed once or twice a day, or when attend- 

 ing the fire. The connection can be made 

 by the local plumber. — Emma G. Wallace. 



Dampening the ashes 

 to prevent the dust 



in. apart in such 



