The ice age in North America and its bearing upon the antiquity of man5th edwith many new maps and illus., enland rewritten to incorporate the facts that bring it up to date, with chapters on Lake Agassiz and the Probable cause of glaciation . the stream is both shallow and narrow, the motionmust be almost completely retarded. On doubling the size * The list of explorers iriven by Rink is worthy of being honored, and is asfollows : Geolo?;ist K. J. Y. Steenstrup (eight summers and two winters);Lieutenant G. Ilolra, of the Royal Navy (five summers and one winter); Lieu-tenant R. Hammer, of tlie
The ice age in North America and its bearing upon the antiquity of man5th edwith many new maps and illus., enland rewritten to incorporate the facts that bring it up to date, with chapters on Lake Agassiz and the Probable cause of glaciation . the stream is both shallow and narrow, the motionmust be almost completely retarded. On doubling the size * The list of explorers iriven by Rink is worthy of being honored, and is asfollows : Geolo?;ist K. J. Y. Steenstrup (eight summers and two winters);Lieutenant G. Ilolra, of the Royal Navy (five summers and one winter); Lieu-tenant R. Hammer, of tlie Royal Navy (three summers and one winter); Lieuten-ant A. D. Jensen, of the Royal Navy (three summers); geologist Sylow (twosummers); painter Groth (two summers); supernumerary officer Larsen (onesummer) ; Lieutenant Garde, of the Royal Navy (two summers and one winter);geologist Knutsen, Norwegian (two summers and one winter); geologist Peter-sen (one summer); botanist Eberlin (two summers and one winter); painterUiis Carstersen (one summer). Steenstrup and Hammer did most on thefiords. THE GLACIERS OF GREENLAND. 81 of a semi-fluid stream, the relative amount of fricti(ni be-comes verv much less, so that it will move more than twice. Fig. oJ.—^Ini> of FrPtlcrikshaab (iliicier. between Cri- and 6:^°. showing conrse of Lieuten-ant . in 1878 (fortv-sevcn and a half miles). The black part, ire : white,land : shaded, water ; J. Jensens niinataks ; D. N., Dolagers nnnntaks : whitelines on the black, crevasses ; arrows, glacier-tlow. Five species of plants were foundon the niinataks which still survive on the White Mountains (N. H.). Dana. as fast as before. This property of a semi-fluid is made suf-ficiently evident from a homely illustration. Molasses incold weather will scarcely run at all through a gimlet-hole,while it will run with considerable freedom through anauger-hole. Xow, the glaciers of the Al]:)s, which were thesubjects of Professor Tyndalls measuremen
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