OCR Text |
Show Nlllllimrlnx l'lintOKl-liplljr, Riihiuarlno phutograph.v Is not likely like-ly to became u popular pastime. Hut It is loaiUng us into unknown regions, and M. Louis Houtan, who began by Investigating the animal life of the waters, has become an enthusiastic sea-bottom canieriKt. He has lately publlbhed soino of his remarkable pho-tographs pho-tographs of submarine scenery. IIo noes a hand camera, which Is enclosed In u tight copper box having a plate glass window, and Is mounted on n eiibt-lroii tripod. Suitable mechanism Is provided to exposo nnd chango the plates. Tho pressure of the water. Inconveniently great uven nt twenty or thirty feet, wns an early dlfllculty, hut this was counteracted by means of a rubber ball, holding about a gallon, from which air was forced through n tube Into the box ns tho pressure increased. in-creased. Light fades rapidly In sinking sink-ing below tho surface, daylight exposures ex-posures being Impracticable at a depth of twenty-five feet. Magnesium powder pow-der Is burned In oxygen In n suitable glass globe, and by this powerful Illumination Il-lumination lnrlnutaneniis exposures nro iiuulo with interesting result. |