Deductive and Inductive Logic

Deductive and Inductive Logic

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1887 edition. Excerpt: ...to others, unless they were fixed by the imposition of names. A Nomenclature is a collection of such names, applied to the members of the various divisions and subdivisions which constitute a classification. The number of natural groups, however, is so enormously large, that it would be next to impossible to devise, and, if possible to devise, it would be impossible to remember, distinct names for each group. Thus, the known species of plants, for instance, amount to upwards of 6o, ooo, and, if we took into account varieties, sub-varieties, &c., the number of groups would be represented by many multiples of this sum. Some artifice, therefore, is necessary by which a comparatively small number of names may be made to distinguish a large number of groups. Botany and Chemistry furnish admirable examples of the employment of such an artifice, and some knowledge of the principles which guide the imposition of names in those two sciences (a knowledge which may be easily acquired) would probably be of more service to the student than anything which he might learn from a body of rules for Nomenclature in general. In Botany, the higher groups (including genera) have distinct names. Thus, we have Dicotyledones, Rosaceae, Rosa, &c. But, when we arrive at the species, these are known by the generic name with the addition of some distinctive attribute. Thus, the genus Geranium is represented in the British Isles by thirteen species, called respectively Geranium phaeum, G. nodosum, G. sylvaticum, G. pratense, G. sanguineum, G. pyrenaicum, G. pusillum, G. dissectum, G. columbinum, G. rotundifolium, G. molle, G. lucidum, G. robertianum. The specific names are selected from various considerations; sometimes in honour of an individual (as Equisetum...show more

Product details

  • Paperback | 146 pages
  • 189 x 246 x 8mm | 272g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236821092
  • 9781236821096