the subject any case in which are absent. We can see this by holding a red pencil in way. The curious rotation of " strobic circles " partly de- front of the eye at arm's length, and while keeping the we see, or think we see, anything differently from pends on persistence and partly on the fact… … Fig. 3.-THE GOUBET PARTIALLY SUBMERGED. floor is some feet lower, and any strongly a sphere which just hides the sun's disk at a certain distance, say ten feet ? As far as illuminated object on the floor in a hori- I can answer the question, I should say between three zontal position appears…
Shaft · Munn · Patents · Device · Scientific American · Crank · Cotton stalks · Water shield · Screw shaft · Furnace door · Engine room · Feed water · Tin roof · Crank shaft · Sewing machine
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