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Closing The Camera: Jl the sheets in the neighborhood of the stable were proved to make a white ground to reflect the object, and Dccident" was after a while trained to go over the white loth without flinching; then came the question how juld an impression be transfixed of a body moving at the ue of thirty-eight feet to the second. The first expedient of opening and closing the Camera on the first day ;ft no result; the second day, with increased velocity in pening and closing, a shadow was caught.
Containing the New Optical Laws of the Camera Obscura or Daguerreotype, demonstrated that converging perpendiculars of the Camera image were indeed mathematically correct and concluded: "Art has always represented objects geometrically, or as they cannot be seen in the perpendicular and visually, or as they can be seen in the horizontal direction."3 But his findings were ignored. Indeed, amateurs were warned in manuals and instruction books never to tip the camera. Many hand cameras were even equipped with levels to assure the viewer that he was holding the Camera horizontally.
The thread for opening and closing the gate is in the top of the hydrant; the gate is moved downward by turning the nut or sleeve at the top of the hydrant, through which the threaded stem works. The drip is closed during the opening of the hydrant and opened during its closing, being completely opened or closed when the gate is closed or open. |
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