THIS is a good elementary text-book, founded on the work by M. E. Lagout (“Takimetry”), which we have already noticed (NATURE, vol. xvi. p. 226). The ground covered by the work before us is not quite ...
The natural geometry of beach life is fascinating. During early morning swims, the flocks of migrating birds soar overhead in very familiar V-shaped formations. From ducks to pelicans, they all seem ...
IN connection with recent endeavours to place the teaching of geometry on the best possible basis, much interest attaches to Dr. Mach's attempt to trace the order in which geometrical facts first made ...
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