...Abstract questions of physics and chemistry he did better on; but theactual quantitative problems, which they expected him to solve in hishead, stumped him completely... 
Various 「Astounding Stories, August, 1931」
...If not, would not the synthetic "Extra Man" be a human beingminus personality? Some very pretty problems here...
Various 「Astounding Stories, August, 1931」
... when we were solving our problems in arithmetic—ah! what I have to tell you is learned also...
Alexandre Dumas, Pere 「Ten Years Later」
...Not only do the things you have got to take, but the things you havegot to take them in, present a fine series of problems to the youngtraveller...
Mary H. Kingsley 「Travels in West Africa」
...We must alwayskeep in mind that accomplishments and inventions which seem so simple tous were new and unsolved problems to the pioneers who worked their wayup from a simian to a human estate...
Peter Nielsen 「The Black Man's Place in South Africa」
...Particularly today most men assume that Africa is far afieldfrom the center of our burning social problems and especially from ourproblem of world war...
W. E. B. Du Bois 「Darkwater」
...Louis for all this bandying of human problems, solong as its grocers and saloon-keepers flourished and its industriessteamed and screamed and smoked and its bankers grew rich...
W. E. B. Du Bois 「Darkwater」
... Von Luschan: in Inter-Racial Problems, p...
W.E.B. Du Bois 「The Negro」
...XLIII of the Journal of the Royal Anthropological Institute of GreatBritain and Ireland; also Inter-Racial Problems, and Deniker, noted above...
W.E.B. Du Bois 「The Negro」
...Four papers on the application of statistical methods to herpetological problems...
Ray D. Burkett 「Natural History of Cottonmouth Moccasin, Agkistrodon piscovorus (Reptilia)」
...The application of serological techniques to the problems ofanimal relationships has been attempted with varying degrees ofsuccess over a period of approximately fifty years...
William B. Stallcup 「Myology and Serology of the Avian Family Fringillidae」
...Was it surprising that Pelléas oftenappeared pensive in the face of those numberless problems...
Maurice Maeterlinck Alexander Teixeira de Mattos 「Our Friend the Dog」
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