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Ovations On Other Sites - Ovation 06 Ovations 06Scraping Home chose the topics covered by Ovations On Other Sites - Ovation 06 without reflecting upon the choices others have made. Asking whether you should be going north or south when no one really understands which direction works better is another way to look at things in a different light. |
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He who sat beside the driver, with his arms folded, and thoughtful, was a tall, well-formed young man, with light hair that curled into his neck, side whiskers, deep and intelligent blue eyes, a face that lighted up with a smile when he spoke, and which had been fair and handsome, but was now scorched and sun-burnt. His hands, too, were small, but hard and weather-burnt, indicating that he had been accustomed to use them at hard work. His dress was of blue petersham, looking neat and new, the short coat buttoning square across his breast; and a tall hat set oddly enough on a head evidently not accustomed to the fashion that dictated such a covering. A broad, white shirt collar, turned carelessly down, was tied with a black silk handkerchief, the long ends of which hung outside his coat. |
Solution is generally best effected in flasks; but where the resulting liquid has afterwards to be evaporated to dryness and ignited, evaporating dishes (fig. 12) are used. With them clock glasses are used as covers during solution to avoid loss through effervescence. Evaporating dishes are also best when an insoluble residue has to be collected, since it is difficult to wash out most residues from a flask. Bumping occurs less frequently in dishes than in flasks. After the addition of the acid, and mixing by agitation, the vessel containing the substance is heated. This is best done on the "hot plate" (fig. 13). This consists of a slab of cast iron about half or three-quarters of an inch thick, supported on loose fire bricks, and heated by two or three ring burners (figs. 14 and 15). The burners are connected to the gas supply by means of _lead_ tubing, to which they are soldered. Flasks and dishes after being put on the plate are not further handled until solution is complete or the evaporation is carried to dryness. The hot plate is contained in a cupboard so as to be out of the reach of cold draughts. |
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