Salt Lake Herald-Republican | 1919-05-04 | Page 31 | Stereoscope is One of War's Deadly Weapons

Stereoscope Is O One e Of Of I Wars War's Deadly Weapons ai the tho plush album on the center conler table in the parlor of oC half thu the home hurne i In America rests rests one onu of oC tho tho deadliest weapons of this war And yot ol In all nIl of ot American Am preparedness pl plants plan nl In all the arming armful of ot a n nation not one ono oie lifted Itself lt elC to suggest iU that n a million soldiers sprin up overnight with stereoscopes In n their hands hand The old old-fashioned stereoscope through which Undo Uncle Elmer Aunt Hetty find and little Chester Sunday Chester Sunday vis visitors It used used to gazo gaze o 0 breathlessly upon marvelous mar views of oC tho Mammoth cave C Lincoln N funeral and anil un t sardine fishers of C Brittany Brittan this quaint l ulous old instrument of oC Sabbath n o-n- carried roaring smashing hell to thu the Hun Buns of 1 th the sr scourge o of the limo world It was vas limo stereoscope cupo that proved cd to be tho the greatest dingle aid to tu the do- do CR of ot the tho aerial photography corps of oC tin the allies In their discovery cry of oC the tho expertly hidden batteries of bf limo tho tho Germans It Il was tho stereoscope O that penetrated the tho best bent hatt battery cam camouflage una fJ that German artillery mon men ever de devised de- de Further th than n that it removed ed tho the ono groat Kroat obstacle to the tho correct reading of ot aerial prints lack prints lack of or the tho proper perspective The camera III In the theair theair air shoots directly downward rd In ithe It s pictures t tand tho he height of 01 objects is Iii lost new and antI and sit aji entirely new viewpoint o on n the tha world given Jhen tho the observer The Tho familiar tn fa- fa familiar objects of or life lICo become mysterious ous to him when ho lie cannot see gee their thol- dimensions In the common fashion rime Tho picture made by a camera looks with nith ono one eye Oc A man looks with two oyes and thc those these t two being a few row Inches apart inform the brain that the object abject looked at h has 8 length breadth I and md depth A eyed one man looking it at the tho front of or a u house world say it i aH a n wall but If It ho hM had another eye oyo it t 1 would fI see 1 a little of or tho side of 01 th the hou house e and signal the Information to the tho I brain that tho the object had three dimensions dimen Now the aerial photographers raph rs applied this truth as IlS follows The They ln know w that two photographs taken en of oC the themo same mo object with an nn ordinary aN camera in which tho the lenses cs aro I Inches apart ap would not produce tho the stereoscopic effect since the tho object I photo photographed r would ho bo miles mile blow bolow too far tar for the tho camera to catch Its di dimensions dl- dl and make thorn them apparent In a picture However fr tho photographers rs be bethought bt bo- thou thought ht themselves that If It tho they put ul yards between tho two pictures pictures- snapped a tron trench h from on one elevation moved yards ahead on a level then t shot hot again again lt It would bo ho as though a n giant Klant It with Ith J yards between his 0 eyes 8 were 10 looking nt ut tho the object bo So they boy tried this mounting tho time resultant re resultant resultant re- re photographs rn hA on cardboard and looking at nt thorn through h an nil old old old-fash fash- fash stereoscope Tho result sult was bettor bet bet- bettor tor than lhnn their anticipations tho the depth and height of ot objects tremendous tremendously ly 1 exasperated exaggerated cn A cottage o loo looped od li HUo 1 a L to oiva a bucket like lIko n Wt II iv t trench l like Uko a n o n f lull hill like a IL mountain I But the they soot noon l to translate those eccentricities into common j moon on-o on o othe the tho tho great thing had l been tiNt do done o net tho landscape was made malic to a assume um reality In pictures H ditches in which men mt mfg ht Ho lie in Insufficient shelter sheller could now ho lie told from high walls behind thoro thor was wa ample an shelter un extremely Important thing to Know knot when saga mon are urt to charge char Into nuch uc territory Steep slopes up which tho molt mun worn to charge which hud had been In ordinary photographs flat Jat as water r. r now showed themselves in let their truo nature death traps and and tho rho discovery of oC the tho fact saved ed tho the lives ef cf C tho the attackers Popular lar Mechanics