By Sheridan Muspratt
This historical e-book can have a number of typos and lacking textual content. buyers can obtain a loose scanned reproduction of the unique publication (without typos) from the writer. now not listed. no longer illustrated. Excerpt: ...off. it really is attainable to build coolers through easily lining a wood cistern with lead: such are used for crystallizing a variety of salts; however it is a question whether or not they should be steered, inasmuch because the cooling needs to be very sluggish, as a result of the undesirable engaging in caliber of the wooden which varieties the coating to the lead. In so much vitriol works coolers are utilized in reference to the pan or pans. consider they're referred to as No. 1 and No. 2, the mode of operating resem bles that of the pans first defined; that's, No. 1 is meant to be cool adequate to undergo bottling. while this can be performed, the contents of the higher cooler, or No. 2, is now run into No. 1, whereas No. 2 is now able to obtain a clean volume from the decrease concentrating pan. it's going to therefore be noticeable that during operating a suite of concentrating pans and their accompaniments, 4 phases should be famous. the higher pan in part concentrates the acid prepared for the reduce pan, which then completes the focus. From this reduce pan it's run into the higher cooler, the place it loses the higher element of its warmth, and at last it's run into the reduce cooler, the place it is still until eventually really chilly or approximately so. Hie method simply defined is in consistent use in a few works, yet isn't really whatsoever common, every one producer restricting the level of his gear to his wishes. The association most commonly noticeable, specifically in small works, is a unmarried boiling-down pan, because it is technically termed; the warmth passing underneath it up one flue and returning to an analogous finish down one other, and then it passes to the chimney. This pan is followed by way of one cooler. The uncooked acid from the chamber is administered into this unmarried pan, the place it really is focused as much as the correct element, and then it truly is run into the cooler, the place it remains until eventually chilly; and ...
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