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Includes details of alkaloid and anti-tumour screening of nearly 2000 species, the pharmacological testing of the alkaloids of selected species, and the chemical fractionation of those species which had reproducible tumour-inhibiting properties.
The Rio Grande National Forest is a storehouse of great natural wealth. It is an important economic factor in the welfare of the surrounding local communities. It is a public asset in which every one of its users should have a personal interest.
The decade since the World War has been in many ways the most extraordinary period in American agriculture. For the first time in the Nation's history, the census of 1925 showed a decrease (since 1920) in crop acreage, in farm animals, in number of farms, and in farm population. Nevertheless, agricultural production increased more rapidly from 1922 to 1926, inclusive, than in any period since 1900, and probably since 1890, when the agricultural occupation of the prairies approached completion.
The proper identification of fleas forms a sound basis for disease prevention and flea control. This publication, prepared primarily as a taxonomic revision, will help those called upon to identify the species of these insects and recommend control procedures. Full descriptions are given of the genera ad higher groups, accompanied in most instances by figures. For species, subspecies, and varieties formal descriptions are avoided, but data have usually been supplied for each as follows: Indication of synonymy, name of type host, type locality, statement relative to range, and remarks upon identification characteristics, nature of original description, references to figures, published notes on biology or economic importance, and redescriptions.
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