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Knight's Mechanical Encyclopedia (ed. Knight) 10 0 Browse Search
Francis Jackson Garrison, William Lloyd Garrison, 1805-1879; the story of his life told by his children: volume 4 4 0 Browse Search
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Browsing named entities in Knight's Mechanical Encyclopedia (ed. Knight). You can also browse the collection for Samuel Lucas or search for Samuel Lucas in all documents.

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Knight's Mechanical Encyclopedia (ed. Knight), M. (search)
y within the furnace. The time and other circumstances determine the depth of the effect; thin pieces become malleable entirely through, admit of being readily bent, and may be slightly forged; thicker pieces retain a central portion of cast-iron, but in a softened state, and not so brittle as at first. On sawing them through, the exterior coat of soft metal is perfectly distinguishable from the remainder. The inventor of the process of rendering articles of cast-iron malleable was Samuel Lucas of Sheffield, by whom it was patented in 1804. As described in his specification, his process was nearly identical with that above described, except that the castings were placed directly in the furnace, instead of being inclosed in boxes. The Siemens regenerative gas furnace is largely used in England now for heating the annealing-oven in which the crucibles containing the cast-iron articles are placed. As arranged for this purpose, the furnace has four longitudinal main flues d
Knight's Mechanical Encyclopedia (ed. Knight), P. (search)
rom 1 to 6, and the variations readily admit of the letters, accented vowels, diphthongs, punctuation marks, numerals, etc. Other arbitrary systems are those of Lucas, Frere, Moon, and Carton. Lucas's, claimed to be the least difficult to learn of the English systems, and peculiarly adapted for those who are deficient in delicaLucas's, claimed to be the least difficult to learn of the English systems, and peculiarly adapted for those who are deficient in delicacy of touch, uses many abbreviations of words and syllables, and is bulky, thirty-six volumes being required to contain the Scriptures, which, in the Boston alphabet, fill but eight. Frere's is a phonetic system; in this the Scriptures are embraced in fifteen volumes. Moon's system, the invention of a blind man, is based on those of Lucas and Frere, resembling the latter in the lines being alternately read from left to right and from right to left, from a supposed motive of convenience. The letters are each formed of one or two lines only, by using nine forms turned in different directions. Few abbreviations are employed. Carton's system resembles
Knight's Mechanical Encyclopedia (ed. Knight), R. (search)
med in America, or paddy, its name in the East Indies, has an outer husk, and a thin cuticle which adheres to the pearly grain with great tenacity. The old method of removing the hulls of rice was by pounding in mortars. These were made of pitch-pine and held about a bushel. The work was performed by the slaves of South Carolina and Georgia in addition to the day's work, a certain amount of hulling being performed by each before regular work and after it. Machinery was constructed by Lucas, about 1780-90, which was driven by tidepower, and operated iron-shod pestles in cast-iron mortars of the capacity of five bushels each. Steam-power was subsequently introduced. Fig. 4315 is an example of the application of machinery to the pestle and mortar huller. The grain, after a rough preliminary, grinding between stones, is passed to the mortar, and is beaten by the ribbed pestle From the mortar it passes to a horizontal cylindrical chamber having wire gauze at the sides, and con