458 



Popular Science Monthly 



number of the projectile, and subtract 

 therefrom the sector number. 



It will be observed that the radially- 

 placed strips on the target are numbered. 

 The two at the extremities are lOO, 



tSUCKER DISK 



PROJECTING TUBE 



TRIGGER PIVOT 



The arrangement of the color arcs on the 

 board and details of the projectile and thrower 



while the intermediate strips are 50, 

 80, 90 and 50 respectively, the first strip 

 at the left being the sum of the sector 

 numbers 20 and 30, the second strip 

 the sum of the sectors 30 and 50, and so 

 on. As the sucker disk is only slightly 

 smaller in diameter than the width of 

 the strip, it is obvious that the disk will 

 not adhere unless it strikes the strip 

 fairly between its edges, so that any one 

 performing that feat is entitled to a high 

 score. This is determined by multiply- 

 ing the value of the strip by the number 

 of the projectile. If the missile should 

 strike the pot of gold the throw would 

 be valued 1000. 



Instead of playing alternately, each 

 thrower uses the six projectiles which 

 are assigned him, which may be marked 

 from I to 6, or any other numbers; but 

 all the players should have the same 

 numbers. This arrangement of the 

 scoring numbers, combined with the 

 values of the projectiles and the rainbow 

 arrangement, distributes the amounts 

 capable of being gained by the combined 

 shots, so that a poor thrower stands a 

 better chance of evening up with an 

 expert handler of the projectile. 



An Improvised Trouble Light 

 for Motorists 



MANY times a motorcyclist, or even 

 an autoist, is caught on the road 

 at night with tire trouble and finds him- 

 self without a trouble light. In this dif- 

 ficult situation, scrape up a small pile 

 of sand. Pour about a cup of gasoline 

 on it, and touch a match to it. This 

 will burn for fifteen or twenty minutes 

 and will provide sufficient light to make 

 the repair. 



A Safety Envelope that Affords 

 Real Protection 



A SAFETY envelope is Intended to 

 give additional protection against 

 opening by an intruder. In the one 

 illustrated in Fig. i, parts A resemble 

 the usual kind with perforated edges, 

 but there Is also used the flap B, this 

 being also gummed and perforated and 

 folded over at the last. The whole Is 

 shown in Fig. 2 with the flap pasted 

 down. The perforations P in the flap 

 come just over the other perforations, so 

 that this end can be torn off as usual. 

 Another method Is seen In Fig. 3. The 

 same envelope Is used, and it is spread 

 out flat. Upon it Is pasted a square of 

 preferably thin paper MNOR, which is 

 opaque on the under side. This sheet 

 is written upon and then folded over as 

 seen In the vertical lines, so as to be 

 somewhat smaller than the envelope; 

 then the latter Is folded as before and 

 pasted, but now the edges need not be 



SECOND 

 FOLD \ 



FI6!!. 



\iimm;w/r»; m/mf!m>!> 



f&l GUMMED 



A perforated opening line to prevent contents 

 of an envelop>e from being tampered with 



pasted, because the folded paper answers 

 the same purpose and gives a tight 

 edge, and an attempt to draw the paper 

 out at the sides would be detected as 

 readily as would the actual opening of 

 the envelope. 



