Staple Dietary Ingredients Secured | My Web Site Page 201 Chapter 02 Page 04

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No. 15. Each row of tubes was expanded at each end into a continuous header, cast of car wheel metal. The headers had a sinuous form so that they would lie close together and admit of a staggered position of the tubes when assembled. While other designs of header form were tried later, experience with Nos. 14 and 15 showed that the style here adopted was the best for all purposes and it has not been changed materially since. The drum in this design was supported by girders resting on the brickwork. Bolted joints were discarded, with the exception of those connecting the headers to the front and rear ends of the drums and the bottom of the rear headers to the mud drum. Even such joints, however, were found objectionable and were superseded in subsequent construction by short lengths of tubes expanded into bored holes.

~Drying and Igniting.~--Precipitates, as a rule, require drying before being ignited. With small precipitates the filter-paper may be opened out, and placed on a warm asbestos slab till dry; or the funnel and the filter with the precipitate is placed in a warm place, and supported by any convenient means. The heat must never be sufficient to char the paper. Some precipitates must be dried at a temperature not higher than 100° C. These are placed in the water-oven (fig. 20), and, when apparently dry, they are taken from the funnel, placed between glasses, and then left in the oven till they cease to lose weight. Such precipitates are collected on tared filters. Those precipitates which will stand a higher temperature are dried in the hot-air oven at a temperature of from 120° to 150°. The drying is continued until they appear to be free from moisture, and until the precipitate ceases to adhere to the filter. In drying sulphides the heat must not be raised to the melting point of sulphur, since, if there is any free sulphur present, it fuses and filters through.

An old chronicle describes for us how his hordes drank their cup of trembling at his hands. There, around about the low hills of the southern Dnieper River, probably on the crumbling sandstone cliffs of Kief--the city, studded with jewel-like legends and famed for its "golden palaces," stood his candidates for baptism; near by were priests from Constantinople, gorgeously arrayed, chanting, in strains unknown to the populace, the Greek church baptismal service. Then the democratic immersion!--rich man, poor man and all, at Vladimir's command, wade into the baptismal waters, some up to their knees, some to their waists, some to their necks, and, thus finding a new faith from Heaven, they crossed themselves for the first time as the thunder rolled on high! Here is Russia remembering her Creator in the days of her youth--and forgetting Him ever since; from then on, Holy Russia! Possibly Holy Vladimir, at any rate, for becoming, with that ceremony, peaceable, except for self-defence, he gave up all of his idols and his aggressive sword. The former he scourged and cast into the river, the latter he sheathed in its scabbard. And all this about 988--the first peace movement of Holy Russia. The faith of it, and its vision and dream came early in her history and have not yet gone out or been extinguished.

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