Summary

Various,  Notes and Queries, Number 203, September 17…

“ I find the nitrate of lead a very useful salt in iodizing paper. Six grains of the salt to the ounce of water, and tincture of iodine added till a pale yellow, will give additional sensitiveness to iodized paper, if the sheets are floated upon the solution. This will shorten the time in the camera nearly five minutes; but it requires care, as it is apt to solarize.
A weak solution of iodide of iron has also the same effect, and, if blotted off at once, it will not blacken by the use of gallic acid.
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Source: Gutenberg

Various,  Notes and Queries, Number 203, September 17…

“ The remedy is nevertheless obvious, and consists in placing the stereographs at the same distance from the eyes as the focal length of the lens. But, if this cannot be done, it were surely better to submit to some trifling exaggeration than to absolute deformity and error. Mr. S. says also, that as we mainly judge of distance, &c. by the convergence of the optic axis of our eyes (Query, How do persons with only one eye judge?) , so, in short or medium distances, it were better to let the camera radiate from its centre to the principal object to be delineated. ”
Source: Gutenberg

Various,  Notes and Queries, Number 203, September 17…

“ I need not say that the robe is the lion's skin, and that there is an allusion to the fable of the ass.
Now to justify this reading. Our ancestors knew nothing of our mode of making genitives by turned commas. They formed the gen. sing., and nom. and gen. pl., by simply adding s to the nom. sing.; thus king made kings, kings, kings (not king's, kings, kings') , and the context gave the case. If the noun ended in se, ce, she, or che, the addition of s added a syllable, as horses, princes, &c., but it was not always added. Shakspeare, for example, uses Lucrece and cockatrice as genitives.
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Source: Gutenberg

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