Archive image from page 189 of The depths of the ocean. The depths of the ocean : a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic depthsofoceangen00murr Year: 1912 V Canna/'/a lamarckii. Per of this species are occasionally met with Fig. 122. and Les. (From Steuer.) The fragile shells deep-sea deposits. Fig. 123. Pterotrachea coi'onafa, Forsk. (From Leuckart, after Steuer.) This species has no shell, and therefore does not enter into the composition of deep-sea deposits. nucleus o
Archive image from page 189 of The depths of the ocean. The depths of the ocean : a general account of the modern science of oceanography based largely on the scientific researches of the Norwegian steamer Michael Sars in the North Atlantic depthsofoceangen00murr Year: 1912 V Canna/'/a lamarckii. Per of this species are occasionally met with Fig. 122. and Les. (From Steuer.) The fragile shells deep-sea deposits. Fig. 123. Pterotrachea coi'onafa, Forsk. (From Leuckart, after Steuer.) This species has no shell, and therefore does not enter into the composition of deep-sea deposits. nucleus of native iron (or an alloy of iron, cobalt, and nickel), surrounded by a shell of brilliant magnetic oxide of iron, to which the magnetic properties of the spherules are due. The brown spherules (see Figs. 132 and 133) have the lustre of bronze externally, and have a finely lamellatefd crystalline structure, with blackish-brown inclusions of magnetic iron, which account for their extraction by the magnet. A cosmic
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Keywords: 1900, 1910, 1912, _michael_sars_north_atlantic_deep_sea_expedition_191, appell_f_jakob_johan_adolf_1857_, archive, book, bookauthor, bookcentury, bookdecade, bookpublisher, booksubject, bookyear, drawing, gran_h_h_haakon_hasberg_1870_, helland_hansen_bj_rn_1877_, historical, history, illustration, image, london_macmillan, murray_john_sir_1841_1914, north_atlantic_ocean, oceanography, page, picture, print, reference, vintage
