Your search within this document for 'spiral' resulted in two matching pages.
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“...years ago at Kingston, when a well-known resident by the harbour shot an alligator, and found in it the collar of his wife’s favourite cat! The Jamaica Club is housed in a spacious building in Hanover Street, and the Masonic Temple is also situated in the same thoroughfare. In Wesley Chapel, in Tower Street, used to stand one of the most curious pulpits in the Empire. It was built around the mast of a ship sunk in the ground and encased in copper, and stood 24 feet high. It was encircled by a spiral staircase all made of wood, the whole being constructed of Jamaica mahogany. The pulpit was the work and the gift of a black man who had been a slave, and it had been valued at £400; but it was wrecked by the earthquake of 1907 and was not restored. To the north of the old race-course are the twin build- ings of Wolmer’s Schools, now Kingston’s foremost school, a charity established by John Wolmer, a goldsmith of Kingston, by his will dated May 21st, 1729. Behind them is the Mico College for...”
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“...ammonia also, and this “ wash,” as it is then called, is allowed to stand in large wooden vats, in which it ferments. In British Guiana this process requires about two days, and in Jamaica a week and upwards. When the fermenta- tion ceases and the wash has settled, it is transferred to the " still,” a copper vessel preferably heated by fire underneath. The spirit is boiled off from the wash, and, after being rectified in a vessel containing vertical tubes surrounded with water, is condensed in a spiral tube cooled with running water. In some cases a " Coffey ” still is used. This is a vertical still consisting of two columns of considerable height, with an internal arrange- ment of alternate shelves. The wash is introduced at the top of the first, and drops from shelf to shelf until it reaches the bottom, meeting on its way down a current of steam, while the vapour from it passes to the bottom of the second column, where it is rectified by the cold wash passing through it in tubes, and condensed...”