and although they have de-veloped a new powder of their ownat their home factories, we believethat it is a high-temperature pow-der of the same general characteras the English cordite. The pres-ent war should serve to give somevery valuable data on this mostimportant subject. NEW PHOTOGRAPHIC LAMP.… … NEW PHOTOGRAPHIC LAMP. such inconveniences, one of the least is the productionof ashes and poisonous gases. The light given by asingle lamp lacks steadiness, thus producing varia-tions in the exposures, and making it necessary toemploy several lamps at once. Now, lamps generallyconsume 40 amperes…
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