...It was proventhat the participation of United States citizens in the tradewas large and systematic... 
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...—The next territory completelydepopulated of buffaloes by systematic hunting was very nearly theentire southern half of Dakota, southwestern Minnesota, and northernNebraska as far as the North Platte...
William T. Hornaday 「The Extermination of the American Bison」
...
—In several of our states, systematic efforts to educate children in their duty toward wild life are already being made...
William T. Hornaday 「Our Vanishing Wild Life」
...The rare little shells composing the group I have now formed into the genus Conœlix, seem to have escaped the observation of modern systematic writers...
William Swainson 「Zoological Illustrations, Volume I」
...The precipitin reaction is the most successful of the serological techniquesthus far devised for systematic comparisons...
William B. Stallcup 「Myology and Serology of the Avian Family Fringillidae」
...The systematic status of Eumeces pluvialis Cope, and noteworthy records of other amphibians and reptiles from Kansas and Oklahoma...
William B. Stallcup 「Myology and Serology of the Avian Family Fringillidae」
...The United States Coast Survey has, in connection with an exploration ofthe Gulf Stream, been the first to establish a systematic series ofdredgings at great depths, continued during several years...
Elizabeth Cabot Cary Agassiz 「Seaside Studies in Natural History」
...Examination of many of the specimens used in our study was possible onlybecause of the cooperation of the curators of many systematic collections...
William E. Duellman 「Neotropical Hylid Frogs, Genus Smilisca」
...574b (which, as shown in the Systematic Table, nowbecomes 574...
Frank M. Chapman 「Color Key to North American Birds」
...The systematic status of the colubrid snake, Leptodeira discolor Günther...
Robert K Selander 「Vertebrates from the Barrier Island of Tamaulipas, México」
...By a systematic and thorough course of legislation, whichlooked to the utmost protection and augmentation of wool andwoollens, she has carried their production beyond any thingthe world has ever seen...
Richard L. Allen 「Domestic Animals」
...—Extreme fatness may be a disease in thedog as in the human being, and in this case it is cruelto accuse the poor creature of systematic over-eating,as it is everyone's impulse to do...
Mrs. Leslie Williams 「A Manual of Toy Dogs」
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