...That is my theory andI am ready at all times to stand in back of it... 
Various 「Astounding Stories, August, 1931」
... But that his theory was sound he accounted fully established, and with that, for the moment, he was content...
Rafael Sabatini 「Scaramouche」
...It appeared that Peter had a theory that every man has a blind spot,and that he knew just how to find that blind spot in the world of air...
John Buchan 「Mr. Standfast」
...This was the logical deduction; but, as is the case with many a plausible theory, one of the premises was decidedly defective...
David Livingstone 「Missionary Travels and Researches in South Africa」
...Here we were detained some days by continuous rains, and thought we observed the confirmation of the Bakwain theory of rains...
David Livingstone 「Missionary Travels and Researches in South Africa」
...Their theory was very simple: "We are the people of God, and the heathen are given to us for an inheritance...
David Livingstone 「Missionary Travels and Researches in South Africa」
...To my mind there is only one thing against your theory, sir,” he continued, turning to the skipper, “and that is the existence of the factory on the lagoon...
Harry Collingwood 「A Middy of the Slave Squadron」
... Thirdly is the drainage of the Tanganyika, which Captain Speke threw southward to the Zambeze, a theory now universally abandoned...
Richard F. Burton 「Two Trips to Gorilla Land and the Cataracts of the Congo Volume 2」
...To feed her steamers the State has established along the river-bankposts for wood, and in theory at these places there always is asufficient supply of wood to carry a steamer to the next post...
Richard Harding Davis 「The Congo and Coasts of Africa」
...All this is because we still consciously and unconsciously hold to the"manure" theory of social organization...
W. E. B. Du Bois 「Darkwater」
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