Journal of the Franklin InstitutePergamon Press, 1843 Vols. 1-69 include more or less complete patent reports of the U. S. Patent Office for years 1825-59. Cf. Index to v. 1-120 of the Journal, p. [415] |
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Seite 208 - ... necessary for their preservation, and in such manner as shall be conducive to a beneficial and favorable display thereof, the models and specimens of compositions and of...
Seite 138 - ... and dull, earthy aspect. Similar phenomena accompany the casting of the fusible alloy of V. Rose, composed of two parts of bismuth, one of lead, and one of tin. The fact of the evolution of heat from the alloy of Newton, and its cause, are thus noticed by Berzelius, in his...
Seite 138 - ... will prevent the metal from running away, and in a few minutes it will cool and take the impression, without the slightest injury to the paper from which it was taken.
Seite 197 - This light does not appear to be allied to phosphorescence, for there is no difference perceived whether the bodies have been long in the dark, or whether they have been just exposed to daylight, or even to direct solar light.
Seite 392 - In the London and plastic clay formations, it will not be safe to make the slopes of embankments or cuttings, that exceed 4 feet in height, with a steeper slope than 3 feet horizontal to 1 foot perpendicular.
Seite 208 - And be it further enacted. That it shall be the duty of the Commissioner to cause to be classified and arranged, in such rooms or galleries as may be provided for that purpose, in suitable cases, when necessary for their preservation, and in such manner as shall be conducive to a beneficial and favorable display thereof...
Seite 199 - Tripoli and putty powder would not remove the images of the smoked and red glasses. 14. An etching, made upon a smoked etching ground on glass, the copper and glass being placed in contact. The image of the glass only could be brought out. 15. A design cut out in paper was pressed close to a copper plate by a piece of glass, and then exposed to a gentle heat; the impression was brought out by the vapour of mercury in beautiful distinctness.
Seite 199 - All the glasses were placed on the copper and slightly warmed ; red and smoked glasses gave after vaporization, equally distinct images, the orange the next ; the others left but faint marks of their forms ; polishing with Tripoli and putty powder would not remove the images of the smoked and red glasses.
Seite 315 - Mr. Bruce states J, that in the last operation for colouring the green teas, " a mixture of sulphate of lime and indigo, very finely pulverized and sifted through fine muslin, in the proportion of three of the former to one of the latter...