s of the frame, to be provided to enable it to project rays of blue, red, and other colors. In addition, two optical projectors cause feathering of the blades, so that they will be e, which extends downward, and is pressed outwardly will be provided, giving the power of illuminating at by a spring… … method. Possibly, says our author, the enemy might HOLMES' AIR SHIP. Fig. l.-SIMPLE TRACER FOR THE LANTERN. fire howitzers at the tower, although he would have glass to the pivotal connection of the bars, b c, is 4 in., difficulty in bringing them to bear, despite the progress the air above the…
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