Carpenter, William Benjamin, 1813-1885, Dallinger, W. H. (William Henry), 1842-1909 · Philadelphia, Blakiston · leaf 799
he Greensand of Cambridgeshirehave long been familiar with solid spherical bodies which therepresent themselves not unfrequently, varying in size from that of apistol-bullet to that of a small cricket-ball; and whilst some regardedthem as mineral concretions, others were led by certain… … Fig. 559.—General view of the internal structure of Parkeria: In the hori-zontal section, l\ l2, P, ?4 mark the four thick layers; in the verticalsections A marks the internal surface of a layer separated by concentricfracture; B, the appearance presented by a similar fracture passing throughthe…
Microscopy
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
