Show THE SALT LAKE TRIBUNE SUNDAY MORNING MARCH 8 1938 arvel — “One- - Science’s Newest cane or earthquake Under the glass the points of strain appeared in brilliant colors Even the strain produced in a celluloid rod by the pressure of one finger was clearly observed Photography too Taking picture of a plate glass front window in ordinary daylight usually-result- s in getting a Sometimes the street by reflection picture light-struc- k scene behind the camera is shown But b? placing a piece of “one-waglass before the camera lens' the highlights in the window seemed to be pierced and the objects behind the plate glass were brought out n the photograph But apart from these potential applications —which admittedly represent a large field of development through future experimentation to say nothing of widespread practice— scientific minds were primarily interested in two points First it was acknowledged that after centuries in which glass has been just what’we know it to be today a new principle had been developed — that of cut- -' ting out sidewise light rays through an arrangement of This principle is readily grasped if one parallel fibers looks endwise through a loosely held bundle of straws then tries to look diagdhally through the same bundle And second even a moment’s thought about the huge amount of accident eyestrain and discomfort occasioned by the use pf ordinary glass which permits the passage of light in all directions at once Opens up new visions of a glareless world increasingly adaptable for human needs (Copyright 1936 King Features Syndicate Inc) Glass 1 y” fx ' ‘ t $ - YOU’D THINK SHE’B BE BLINDED And Many an Autolst Is Blinded of Course by the Glare from Two Powerful But as Headlights Long as You're Not Looking Directly Into a "Polaroid” Lens Blinding Doesn’t Occur—and eTsts Show You Can Stand Just Outside the Luminous Path and Read an Automobile License Number Placed Beside the Headlight! 11 V ' ' 'W' ' : ' — 4 CONTROL SOMETHING NEW IN LIGHT-RASheet of Polarized Glass Lets the Light Pass Through Much Like Ordinary Glass —but Two Sheets Must Be Exactly Parallel or the Kays Won’t Penetrate A Single CERTAINLY nothing can be much more familiar in our lives than glass — but it seems to be a principle of progress that the last things to be improved to fcny drastic extent are the most familiar things Everybody takes glass for granted— including its well known glare and reflection of more or less blinding highlights and infact —some- cluding too the altogether times quite an embarrassing fact in the case of windows — that it can be seen through from all directions It has long been a proverb that people who live in glass houses should ' —pull down the blinds Well nothing traditional is safe from the inventive mind nowadays and recently a grotip of scientists and interested onlookers in New York saw a laboratory demonkind of glass It’s glass all right stration of a brand-nebut it cuts out glare and makes the rays of light pass straight through without sideplay or spillover from the main direct path It’s a glass that can’t be seen through If used in a double layer excepting from the one direction Almost the most extraordinary thing about it proved to be the fact that if used in an automobile headlight a pedestrian could stand right alongside the usually blinding headlight ray and if not right in the direct Une could plainly read the license number of the car! Laet year 3590 accidents took place on the public highways because of blinding headlights Think what it would mean if one were able to walk or drive along roadways without any fear of momentarily going blind because of a powerful light shining in the eyes! The new glass further was shown to have the curious effect of bringing objects out “in the round" Thus It was movies and claimed it makes possible dear television reception as well as testing defects in aircraft bridge building skyscrapers and other lines of structural construction The ladies too may ultimately derive benefit for beauty specialists apparently are able to look through the outer skin see the living underlying tissue study its natural tint and prescribe proper care The inventor Edwin H Land a young Boston scientist has called his “one-waglass “polaroid” In appearance it is much like ordinary glass clear ahd colorless Light that passes through polaroid looks like ordinary light but there the similarity ends As those attending the laboratory session were informed each plate of polaroid glass contains millions of tiny cone-shapcrystals made by taking alkaloids "like quinine sulphate in small proportions suspending them in a cellulose acetate solution and binding this mixture between glass The inventor devised a method of laying these crystals magnetically so they line up side by side Each cone is pointed in the same direction creating a comblike effect “Because of this fact” explained young Land “this material permits the passage of light vibrating in only one plane while light in all other planes is checked “Light from the sun” he went on to explain “is a compbsite of a great many waves vibrating in all possible planes at right angles to the direction of travel of the beam Such light is said to be ‘unpolarized’ In effect the waves of the sun are infinitely tangled together Polarization can be visualized as a complete untangling or ‘combing out’ of these light waves so that the Wave motions all lie in the same plane ‘Polaroid’ is the optical comb that accomplished this effect” The effect of this substance on the ancient window and “peeping” problem was interesting Light is freely admitted and a person inside a room would be able to look out though better in a single direction than in others But — a dweller across the light-we- ll with the same kind of glass m his window could see in only if the windows m both apartments were perfectly in the same plane — that is parallel If there were any marked angle both windows would appear black Working on his new principle gave Land the idea of placing polaroid in automobile headlights and windshields He contends that night driving would be as safe as driving during the day On actual road tests no headlight glare was apparent Objects around the headlight and behind it were brought clearly into view License plates placed directly above the headlights could be easily read — even the radiator and gas fumes from the exhaUst were readily observed — as long as the observer’s eyes weren’t directly in —the illuminated spot Motion pictures were taken by Land with a double color camera having two lenses as far apart as the human eye Two projectors were operated m unison on a single screen one oyer the other Polaroid glasses were distributed to the audience — spectacles that actually made the wearer see two separate One lens was polarized vertically images on the screen and the other horizontally Therefore one eye was looking at one image and the other eye at its complement The pictures on the screen “came to life’1 and gava observers much the sense of being at an actual play Flesh colors became realistic and the human forms looked ' Added to the usual length and width seen in rounded motion pictures vasthe new— and third — dimension of 4 taken-for-grant- w al RUGS have rich color and beauty Even more important they keep this beauty with the very minimum of care— an easy daily dusting— an occasional waxing with Wax Armstrong’s Linogloss QUAKER y” self-polishi- Spilled things that would ruin many floors wipe off these rugs without leaving a trace Here’s why every Quaker Rug is made froth good thick felt printed in rich oil colors surface-seale- d against spotting and staining Dust dirt and spilled things stay right on the surface— can’t penetrate itl ed depth “One-way- ” glass claims its inventor Four of the very newest Quaker Rqp are shown here If none of them quite suit your taste remember tjiere are more than a score to choose from with an attractive variety of colors and patterns See the new play rug for children FREE! 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