he companies which perpetuated them. interior of the telescope, and makes the black threads show Van Assche. Upon a piece of glass he lets fall a drop of upon a brilliant field, and the bright threads upon a dark While at Chicago, Mr. Bruce went to see the new works of melted and sublimated… … might live through the year, when they would rays pass through the cell; being at the same FRAUE FOR PROTECTING TREES IN WINTER, not otherwise do so. It will be seen from time subjected to a definite refraction. The the illustration that the frame which holds transmitted light is monochrornatic, of…
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