A review of the plant systems of other authors beginning with Andrea Caesalpino (1519-1603), and an elaboration of Linnaeus' own rules for a natural system whic

Many literary critics seem to think that an hypothesis about obscure and remote questions of history can be refuted by a simple demand for the production of mor

Vols. for 1933-41, 1945 includes the Annual report of the director, 1933-40, 1944.