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Author    Munn, Orson D.

Title   Scientific American April 1931 Volume 144 Number 4

   Paperback

Condition   Good

   First Edition

Size   4to - over 9" - 12" tall

Publisher   New York Scientific American Publishing Company 1931

Seller ID   35507806

A particularly interesting issue with topics ranging from the 100 horsepower blower for the organ in the new Chicago Stadium to an English vending machine which dispenses individual lit cigarettes. Features: The eyes and ears of the railroad - the complicated signal system that spells safety for rail travel; Editorials - Arthur G. Halfpenny - An Awakening Due - Lopsided progress; International Affairs; Did a meteorite strike a car in Crawfordsville?; New light on old fools - ultr-violet irradiation to create vitamin D; Unique solutions of bridge construction problems - caissons sunk on artificial islands - divers employed; Vacuum tubes in industry - thermionic tubes, grid-glow relays, photo cells find wide use; A new use for radium - radiography possible without combersome apparatus; Radio goes man-hunting - radio alarm system reduces the criminal's chance of escape; New temperature measurements of the sun, moon, mars - sensitive thermo-couples reveal surface conditions; Chicago's "Madison Square Garden" - called "world's largest sports arena"; has unusual features; Butterfly farming - an intriguing business started by Iowa youth; When locomotives go to sea - special steamers built to accomodate monsters of the rails (excellent photos); A machine-age "milk maid" - the "rotolactor' milks 240 cows in one hour; Centrifugally spun concrete piles - new manufacturing process; mass production of preserved foods - a huge industry that grew from a market basket; Salt making in India - Primitive methods illustrated and described. Average wear. Unmarked. Crease to front cover. Advertisement inside front cover features photo of luxurious Cord front drive automobile manufactured by the Auburn Automotive Company.

A  Particularly  Interesting  Issue  With  Topics  Ranging  From  The  100  Horsepower  Blower  For  The  Organ  In  The  New  Chicago  Stadium  To  An  English  Vending  Machine  Which  Dispenses  Individual  Lit  Cigarettes.    Features:  The  Eyes  And  Ears  Of  The  Railroad  -  The  Complicated  Signal  System  That  Spells  Safety  For  Rail  Travel;  Editorials  -  Arthur  G.  Halfpenny  -  An  Awakening  Due  -  Lopsided  Progress;  International  Affairs;  Did  A  Meteorite  Strike  A  Car  In  Crawfordsville?;  New  Light  On  Old  Fools  -  Ultr-violet  Irradiation  To  Create  Vitamin  D;  Unique  Solutions  Of  Bridge  Construction  Problems  -  Caissons  Sunk  On  Artificial  Islands  -  Divers  Employed;  Vacuum  Tubes  In  Industry  -  Thermionic  Tubes,  Grid-glow  Relays,  Photo  Cells  Find  Wide  Use;  A  New  Use  For  Radium  -  Radiography  Possible  Without  Combersome  Apparatus;  Radio  Goes  Man-hunting  -  Radio  Alarm  System  Reduces  The  Criminal's  Chance  Of  Escape;  New  Temperature  Measurements  Of  The  Sun,  Moon,  Mars  -  Sensitive  Thermo-couples  Reveal  Surface  Conditions;  Chicago's  "Madison  Square  Garden"  -  Called  "world's  Largest  Sports  Arena";  Has  Unusual  Features;  Butterfly  Farming  -  An  Intriguing  Business  Started  By  Iowa  Youth;  When  Locomotives  Go  To  Sea  -  Special  Steamers  Built  To  Accomodate  Monsters  Of  The  Rails  (excellent  Photos);  A  Machine-age  "milk  Maid"  -  The  "rotolactor'  Milks  240  Cows  In  One  Hour;  Centrifugally  Spun  Concrete  Piles  -  New  Manufacturing  Process;  Mass  Production  Of  Preserved  Foods  -  A  Huge  Industry  That  Grew  From  A  Market  Basket;  Salt  Making  In  India  -  Primitive  Methods  Illustrated  And  Described.    Average  Wear.    Unmarked.    Crease  To  Front  Cover.    Advertisement  Inside  Front  Cover  Features  Photo  Of  Luxurious  Cord  Front  Drive  Automobile  Manufactured  By  The  Auburn  Automotive  Company. 

Price = 199.95 USD


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