ient rotator, in which the means of upon the glass tube. The remaining packing ring showing the wire. Under the loadstone is placed a small is placed on the end of the glass tube, the second communicating rotary motion does not appear on the cup filled with fine iron filings, and also in the field… … ratus a glass wheel, provided with a brass rim, is furnished with a shaft, which turns in a hole bored in the center of a thick glass supporting disk. The brass ings and removed, showing that it has no power to lift the filings; then while itis still in the field of the lantern, the needie is…
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