. Agriculture and the farming business . utomatic sealing machines you will not needeither solder or additional heat. Simply buy caps and themetal rims and paper rings or gaskets with your cans. Forthe other sealing device use the standard rim-seal cans. Soldering equipment necessary.—Capping steel tip-ing copper, solder, sal ammoniac, a few scraps of zinc, twoand seven-sixteenths inches opening tipping, solder flux,a small brush, porcelain, glass or stone cup in whichto keep flux, a soft brick and a file. If using automaticsealer none of those things is needed. Soldering flux.—Soldering flux,
. Agriculture and the farming business . utomatic sealing machines you will not needeither solder or additional heat. Simply buy caps and themetal rims and paper rings or gaskets with your cans. Forthe other sealing device use the standard rim-seal cans. Soldering equipment necessary.—Capping steel tip-ing copper, solder, sal ammoniac, a few scraps of zinc, twoand seven-sixteenths inches opening tipping, solder flux,a small brush, porcelain, glass or stone cup in whichto keep flux, a soft brick and a file. If using automaticsealer none of those things is needed. Soldering flux.—Soldering flux, which may be pur-chased ready for use, is a solution of crude muriatic acidand zinc diluted with water and strained through a is used for cleaning the Irons and for brushing thetin and solder surfaces so as to make it possible for thesolder in its melting condition to adhere to the tin. Pow-dered resin is sometimes used instead of the soldering soldering paste is also manufactured which is very 358 AGRICULTURE AND. Automatic can sealing niacliiue, seals without beat or , or rented by tile year, to clubs and individual growers. THE FARMING BUSINESS 359 serviceable. The following soldering preparation or fluxhas been found to be very desirable, and is cleaner than theold flux: Zinc chloride oz. Ammonium chloride grains. Water 1 quart. Tinning a capping iron.—Purchase five or ten cents,worth of sal ammoniac at the drug store. Melt in this a lit-tle solder. Heat the capping iron enough so that it will meltthe solder easily. Place the iron in the vessel containing themixture of sal ammoniac and solder. Rotate iron in thisuntil the soldering edge of the iron has become bright orthoroughly covered with the solder. Tinning a tipping copper.^—The tipping copper istinned very much the same as the iron. Sometimes it isdesirable, however, to file or scrape the tipping copper abit so as to make it smooth and to correct the point. Heatthe iron a
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