The Photographic news, ed. by W. Crookes. Vol.1, no.1 - vol.13, no.542; vol.33,34 [imperf. Incorporated with Amateur photographer].

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sir William Crookes
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Page 242 - CC1 materials are used and 25 percent when CC2 materials are used. 6. Skylight units shall be separated from each other by a distance of not less than 4 feet measured in a horizontal plane.
Page 352 - A. GOODRICH, DD, Professor in Yale College. To which are added, *' Walker's Key " to the Pronunciation of Classical and Scriptural Proper Names ; a Vocabulary of Modern Geographical Names ; Phrases and Quotations from the Ancient and Modern Languages ; Abbreviations used in Writing, Printing...
Page 50 - Make a saturated solution of bichromate of potass to which has been added 25 per cent, of Beaufoy's acetic acid. Float the paper on this solution for an instant, and when dry it is fit for use ; this must be done in the dark room.
Page 50 - ... at 2d. per ounce is substituted for nitrate of silver at 5s. per ounce. Secondly, Photographs in this way can be produced with greater rapidity than by the old mode. Thirdly, The pictures being composed of the same materials which form the constituent parts of writing ink, it may be fairly inferred that they will last as long as the paper on which they are printed.
Page 205 - ... if necessary, all the light admitted during daylight. 5. Shades for the eyes in certain affections of the sight, to take the place of the green or blue silk and card shades worn by many persons. The gelatine paper being transparent, will allow the wearer to see his way about, at the same time that the eyes are protected from a glaring light. This may be especially useful in cases where it is desired not only to shade a diseased eye, but also to protect its nerves from strong light admitted by...
Page 20 - To our eyes it is bounded by red at the one end and violet at the other, the edge being sharply marked at the red end, but less abruptly at the violet. But a ray of light contains besides the rays visible to our eyes others which...
Page 247 - ... all moisture has been previously expelled. When the varnish has ceased to simmer, the plate is withdrawn from the heat, and left to cool and dry in a gentle temperature, and protected from a damp atmosphere.

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