"Wheal" Quotes from Famous Books
 ... tubes in boilers for increasing the heating surface had long been known. As early as 1780, Matthew Boulton employed copper tubes longitudinally in the boiler of the Wheal Busy engine in Cornwall—the fire passing through the tubes—and it was found that the production of steam was thereby considerably increased. The use of tubular boilers afterwards became common in Cornwall. In 1803, Woolf, the Cornish engineer, patented a boiler ...
— Little Masterpieces of Science: - Invention and Discovery • Various
... substance, usually occurring as thin encrustations with a mammillary surface; occasionally, however, it is earthy and pulverulent. The colour varies considerably. from colourless to yellow, brown, blue or green. Specimens of a brilliant sky-blue colour, such as those found formerly in Wheal Haniblyn, near Bridestowe in Devonshire, and in Sardinia, are specially attractive in appearance; the colour is here due to the presence of the copper mineral chrysocolla. The hardness is 3, and the specific gravity 1.9. Chemically, it is a hydrous aluminium silicate, ...
— Project Gutenberg Encyclopedia
... p. 443, on the analysis of pollux and the subsequent work of F. Pisani, Comptes Rendus, 1864, 58, p. 714). Caesium is found in the mineral springs of Frankenhausen, Montecatini, di Val di Nievole, Tuscany, and Wheal Clifford near Redruth, Cornwall (W.A. Miller, Chem. News, 1864, 10, p. 181), and, associated with rubidium, at Duerkheim; it is also found in lepidolite, leucite, petalite, triphylline and in the carnallite from Stassfurt. The separation of caesium from ...
— Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 - "Bulgaria" to "Calgary" • Various
... sea-coal is called in the document, are said by Ducange to have been known in France by the popular name of hulla, a word evidently identical with the modern French houille and the Cornish Huel, which in the form wheal is an element in the name ...
— The Earth as Modified by Human Action • George P. Marsh
... cried, in a snarling sob. "You dog!" And his lash came down and cut a long red wheal across Sir Oliver's ...
— The Sea-Hawk • Raphael Sabatini
... rocked on his knees before me. Instinctively he approached me to hamper my movements, whilst I moved back to give my lash the better play. He held out his arms and joined his fat hands in supplication, but the lash caught them in its sinuous tormenting embrace, and started a red wheal across their whiteness. He tucked them into his armpits with a scream, and ...
— Bardelys the Magnificent • Rafael Sabatini
... At Wheal Friendship mine in Cornwall, a different contrivance is employed: there is in that mine an inclined plane, passing underground about two-thirds of a mile in length. Signals are communicated by a continuous rod of metal, which being struck ...
— On the Economy of Machinery and Manufactures • Charles Babbage |
