al interest and when the frame, G, is moved back and forth, a recipro- method of determining the hight of the aurora borealis; use. The SCIENTIFIC AMERICAN has been published Foubttcei* cating rotary motion is communicated to each pulley, the since, if this beautiful phenomenon is due, as is gener-… … puller, C, turning to the right when the pulley, D, is the interplanetary spaces, the supposition of Newton that Ten Copies, for Twelve Months $15 Fifteen Copies, for Twelve Months $22 turning to the left, and mce versa. Now, this invention such spaces may be filled with an etherial form of mat-…
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