Popular Science Monthly 



265 



This Device Protects Your Clieck 

 From the Forger 



A CHECK book cover provided with a 

 protecting device which makes it 

 impossible for a man to raise a check, 

 has been phiced on 

 the market. Vari- 

 ous amounts up to 

 one thousand dol- 

 hirs are stamped on 

 the check near the 

 row of perforations 

 where it is detached 

 from the stub. The 

 protector is per- 

 manently attached 

 to the leather cover 

 of the check book, 

 and it can be 

 quickly adjustedf or 

 any of the three 

 columns of figures. 

 A sliding straight- 

 edge is moved either 

 up or down to the., 

 correct figure. The 

 fast and the check 



Tear off your check, and 

 appearing at the left 



protector is pressed 

 torn from its stub. 



departments by the same vehicle, and 

 large packages, which formerly would 

 have been delivered by a special mes- 

 senger, are stored beneath the pigeon holes 

 on the floor of the car. 



A driver and a clerk go with each truck. 

 Six complete trips a 

 day are made. The 

 extent of the plant 

 can be estimated 

 from the fact that 

 each trip requires 

 at least an hour, 

 v>vlUx,. \ ^^^ sometimes an 



"^ ^^ .^.'^^^*^:Z'-::^\ hour and a half, 

 depending on the 

 quantity of mail 

 to be distributed, 

 and the congestion 

 of the aisles. The 

 deliveries are all 

 made under one 

 roof although over 

 two floors. 



This system takes 

 the place of pneu- 

 matic tubes, through which bulky pieces 

 of mail could not be sent. 



the maximum amount 

 is your protection 



The Electric Stevedore Distributes 

 the Mail 



THE mail of the various departments 

 of a big manufacturing plant in 

 East Pittsburg is 

 delivered by an 

 electric truck, of 

 the type commonly 

 known as "the elec- 

 tric stevedore." 

 On the flat body 

 of the little truck 

 is mounted a sort- 

 ing table which has 

 eighty pigeonholes, 

 which occupy 

 shelves on both 

 sides of the ve- 

 hicle. The mail is 

 sorted while the 

 car is running, and 

 the saving of time 

 is about fifty per 

 cent over the former 

 method. 



Mail is collected 

 from the various 



A 



A specially fitted truck 

 pneumatic tube system 



How Cutting Tools Are Doing 

 Their Bit 



NY manufacturer who is turning 

 out tools is as important to the 

 Government as if 

 he were making 

 munitions. 



Nine hundred 

 and ninety-seven 

 cutting tools alone 

 are required in 

 manufacturing a 

 modern rifle. The 

 twist drill is one of 

 the busiest of these. 

 To supply a million 

 rifles, ninety-four 

 million holes must 

 be drilled. 



Shrapnel, tor- 

 pedoes, machine 

 guns, biplanes, mo- 

 tor trucks and 

 anti-aircraft guns 

 require from seven- 

 ty to five thousand 

 holes each. 



takes the place of a 

 for distributing mail 



