Popular science monthly . —POINTBEYOND FOCALPOINT^,jV___^OWNWARD GUWL RAYS WHICH*^ARE NOT ELIMINATED BECAUSETHET POINT TDWARD GROUND AMDNOT IN EYES OF OTHER DRIVERS UPWARD GLARE RAYSELIMINATED BY SHIELD RARABOLIC REFLECTOR At right: A three-section garage doorwhich slides around a comer on a trackBelow: Portable loaders mounted onwheeled frameworks for unloading freight r Below: A greaseand oil gun thatrequires no screw-ing, air pockets orpaddles. The gunis loaded by re-moving the lowercap and filling it. ^i4^fc|^:5^ s4 ^

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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872