lor projection lanterns. These next to the front. Now let the operator move the reflector, paper can be made to pass from green to tinter slowly backward till it covers the opening, while tinters are made by inclosing a film of colored gelatine yellow through many beautiful tints and shades.… … THE CHROMO-CAMERA. + 0 author to the use of students and teachers. To use the color-camera, place a table close to a win- A NEW GAS-GENERATING MACHINE. Place a white rose in the box, and we shall see a pink dow having a north or sky light free from réflections In the ordinary method of generating…
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