... He can thus explain the rationale of the cure by his own art, and the ocular demonstration given is well appreciated... 
David Livingstone 「Missionary Travels and Researches in South Africa」
...This transparency is a matter of ocular demonstration in white people...
Thomas Clarkson 「An Essay on the Slavery and Commerce of the Human Species, Particularly the African」
...The fact is from a too ready credulity, we have now turned to almost a total scepticism, unless we have ocular demonstration...
Captain Frederick Marryat 「The Mission; or Scenes in Africa」
...Certainly I have ocular proof that Zinder, an importantprovince, has been added to the territoriesof this most powerful prince...
James Richardson 「Narrative of a Mission to Central Africa Performed in the Years 1850-51, Volume 2」
...Such traditions, once established in abackwoods village, acquire an authority quite superior to fact andproof against much ocular refutation...
Charles G. D. Roberts 「The Watchers of the Trails」
...The rest I left to ocular computation, which, in such smallsections, is quite as certain as any mechanical division...
Thomas Orchard 「The Astronomy of Milton's 'Paradise Lost'」
...Here we had anexquisite ocular demonstration of a system, though, of course, on a muchsmaller scale, precisely identical with that which Copernicus hadproposed...
Robert Stawell Ball 「The Story of the Heavens」
...The customary arrangement ofparts in such a telescope is shown in , where thepart marked O is called the objective and VE (the magnifyingglass) is the eyepiece, or ocular, as it is sometimescalled...
George C. Comstock 「A Text-Book of Astronomy」
...A is in a dark room, lies on a chair having the eye at the ocular andcan easily look over 2° in declination...
Carl Vilhelm Ludvig Charlier 「Lectures on Stellar Statistics」
...Lowell’s claim tohave had ocular demonstration of the handiwork of intelligent organisms onMars...
E. Walter Maunder 「Are the Planets Inhabited?」
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