Popular Science Monthly 



325 



Can You Tell Which Part of These 

 Ruins Is Camouflage? 



THE French invented the word camou- 

 flage, but the Germans are fast be- 

 coming past masters of the art — as wit- 

 ness the ac- 



companying 

 photograph. 

 Between two 

 shell battered 

 walls of the 

 church at 

 Moncy-aux- 

 Bois they built 

 a concrete ob- 

 servation tower 

 with slits for 

 machine gun 

 operations. So 

 cleverly colored 

 and arranged 

 to fit the gen- 

 eral landscape 

 was this little 

 addition, that 

 from a distance 

 it looked like a 



would be a protection to firemen and 

 workmen about electric furnaces, blast 

 furances, glass plants and wherever else 

 high temperatures must be encountered. 

 The well known heat resisting proper- 

 ties of asbestos, together with the fact 



that, unlike 

 any other min- 

 eral, it will 

 cleave into fi- 

 ber, dehcate as 

 fiax, make it 

 the one sub- 

 stance in all 

 nature ideally 

 adapted to such 

 a purpose. 



A cleverly camouflaged observation tower which 

 contains slits for maneuvering real machine guns 



Here's a New 

 Cutting Steel 



WORD has 

 come 

 that is of much 

 interest to 

 American me- 

 chanics. The 



part of the original ruin. 



Let the Flames Roar. He Wears 

 an Asbestos Suit 



AFIRE-FIGHTING 

 suit of asbestos cloth 

 is one of the latest and most 

 useful of the many practical 

 applications of this remark- 

 able mineral substance. The 

 long, gossamer shreds of the 

 snowy-white mineral, soft 

 as thistle-down, are woven 

 into a firm, heavy cloth 

 which can be used for 

 gloves, coats, trousers and 

 leggings. Such clothes 



The long, gossamer shreds of the snowy-white mineral, 

 soft as thistle-down, can be woven into firm, heavy cloth 



English have recently invented a strong and 

 superior high-speed steel. Such news to 

 the layman may mean little. But to 

 those who know, it is as welcome as the 

 news of a great land victory. Why? 

 Because that side which 

 can turn out war ma- 

 chinery the fastest will 

 win the war! 



With this new tool steel 

 — "colbaltcrom," it is 

 called — engines and guns 

 can be worked faster with 

 out the added heat that 

 develops and affects hard- 

 ness and rigidity. 



Tools of this steel can be 

 cast into shape, and cast- 

 ing is the quickest known 

 way of making any tool. 

 There are few steels, how- 

 ever, which by casting 

 them do not become brit- 

 tle. "Colbaltcrom steel," 

 nevertheless, can be made 

 in this manner instead of 

 having to be forged and 

 rolled, two very much 

 lengthier and more expen- 

 sive processes. 



