...A moment they sharpened in their gaze as he brought his visitor into focus... 
Rafael Sabatini 「Captain Blood」
... He moved to shut the door, and came backinside my focus opposite the window...
John Buchan 「Prester John」
...It should be simply treated with a mildantiseptic ointment, while the constitutional weaknessis the focus for attention...
Mrs. Leslie Williams 「A Manual of Toy Dogs」
...Renault asserts that the disease has but one single focus, the steppesof Russia and Hungary...
Honoré Bourguignon 「On the cattle plague: or, Contagious typhus in horned cattle. Its history, origin, description, and treatment」
...Its beams seemed to have their focus on the spot where they were standing...
Mayne Reid 「The Giraffe Hunters」
...This leader, this focus, isthen remembered, thought of, imaged; from being perceived year byyear, he is finally conceived; but his basis is always in actual factof which he is but the reflection...
Jane Ellen Harrison 「Ancient Art and Ritual」
...Amongthe Ainos the Bear is what psychologists rather oddly call the main“food focus,” the chief “value centre...
Jane Ellen Harrison 「Ancient Art and Ritual」
...And there, I think, for the firsttime, the whole gamut of natural vision, tone, colour, form, lightand shade, atmosphere, focus, &c...
Harold Speed 「The Practice and Science Of Drawing」
...When incident rays are parallel, the reflected rays converge to afocus, but when the incident rays proceed from a focus, or aredivergent, they are reflected parallel...
Henry H. Snelling 「The History and Practice of the Art of Photography」
...Athensconcentrated within herself, as in a focus, the whole exuberanceand many-sidedness of Greek life, and glorified it into beautifulunity...
Marcius Willson 「Mosaics of Grecian History」
...It is advisable to focus the enlargement with the largest aperture of the lens...
John A. Tennant 「Bromide Printing and Enlarging」
...Having secured the image correct in size and focus, place thumb-tacks at all four sides of the sheet of paper or card used to focus the image...
John A. Tennant 「Bromide Printing and Enlarging」
...The lines A B C represent parallel rays which pass through the lens, D D,and meet at F; this point being the principal focus, its distance from thelens is called the focal length...
Samuel D. Humphrey 「American Handbook of the Daguerrotype」
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