Popular Science Mont/il// 



485 



Instead of closing its doors or moving while 

 where it was and had a new structure built 



Building a Bank Around a Bank 

 Without Disturbing Business 



A DETROIT bank recently found 

 that so much money was coming in 

 that there was not enough room to 

 store it. Instead of closing the doors 

 and shutting off this desirable influx 

 of dollars, the bankers decided to build 

 a new home for their dollars outside of 

 the old one. 



Accordingly, banking hours remained 

 the same. As the old building was torn 

 down, part by part, new olifices were 

 opened in the growing outer structure. 

 There was no interruption. The new 

 building has three times the capacity 

 of the old one. 



Steel Cutlery Which Will Not Rust 

 Under Any Circumstances 



THE housewife can now cease to 

 worry about tarnished or rusted 

 knives, forks, etc. A new steel has ap- 

 peared from which cutlery is being made 

 which not only takes a I)eautiful polish 



its building was being enlarged, this bank staid 

 around the old without the least interruption 



but which preserves this appearance 

 under all circumstances. It neither rusts 

 nor tarnishes in contact with foods or 

 acids and its use is making great head- 

 way. To be able to use a knife or fork 

 and to have it maintain its original 

 brightness by simply washing it is a 

 boon to the housekeeper. 



The new steel composition was in- 

 vented in England and is what is com- 

 monly known as an alloy steel. It is not 

 a high carbon steel for it averages only 

 0.25 to 0.35 per cent carbon but the 

 ingredient which bestows on it its 

 unusual properties is chromium, a chem- 

 ical clement or metal similar to nickel. 

 By incorporating from 12 to 13 per cent 

 chromium in mild carbon steel, the new 

 stainless properties are bestowed upon 

 the manufactured product. 



The new steel is more expensive than 

 that formerly used in making steel cut- 

 lery but its lasting properties as well as 

 its appearance and convenience more 

 than offset this extra cost. Its possibil- 

 ities are not limited to cutlerv. 



Those of us interested in science, engineering, invention form a kind of guild. 

 We should help one another. The editor of The Popular Science Monthly is 

 willing to answer questions. 



