au Street, New York. is constructed on the student's lamp principle, and is microscope, and a spectroscope may be applied to this Fig. 1 shows the various adjustments of a new form lantern. The self-focusing arc lamp has been adapted provided with a central c'.a:jght and a positive wick e#if "HI… … Fig. 8. INCANDE8CENT ELECTRIC LAMP Fig. 7.-WEL8BACH GAS BURNER APPLIED Fig. 6.-HAND FEED ELECTRIC APPLIED TO LANTERN. TO LANTERN. LAMP. to various purposes, aside from lantern use, including adjustment. This lamp gives unusually strong light, of lantern called the Criterion. In this cut the various…
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