Jones, H. Spencer (Harold Spencer), 1890- · London E. Arnold & co. · leaf 274
ainly in the northern hemi-sphere and cover more than haH the surface. There is atendency to interpret these markings in terms of the physicalconditions existing on our Earth and to consider the greyishregions as sheets of water and the brown regions as land,probably deserts of sand or rock. The… … 1S99 J.VMAKY 30. nr.:!vn hy 1. 11. R. PkilUpS. 1S99 Febuuakv t. (a) M.AKs.
Astronomy
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