e of astronomical views of the a spark enters the space above the oil, and, igniting the gas The mode of operation is clearly shown in our engraving;. therein, causes an explosion. The present contrivance pre- sun, in which the apparent size of the sun varies according vents this, and at the same… … cised an influence on the size of the image. away as to necessitate readjustment of the WINTERBURN'S REGULATOR FOR OIL STOVE WICKS, Upon a pre-lighted plate the image is smaller raising and lowering mechanism, this is easily than on a fresh plate. M. Angot finds the ex- done by simply moving the…
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