t once Paris, and was first exhibited at the Chicago World's into use. Fair and subsequently at Atlanta and Nashville. It As a precaution against the extinction of the light consists of two great lenses, each 9 feet in diameter, through the failure of the lamp, the whole lamp with its between… … untiring labors of a lifetime of a great specialist, but a Fig. 1. -THE NINE THOUSAND CANDLE POWER large expenditure of money by Prof. Marsh, especially ARC LAMP. in the organization and work of the expedition which he led with fruitful results in the Rocky Mountain Fig. 2. NINETY MILLION CANDLE…
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