. A study of the factors affecting temperature changes in the container during the canning of fruits and vegetables . s passed through the brass fitting by way of a f-inch hole until thebulb reaches the center of the test can, as determined by carefulmeasuring beforehand, the funnel-shaped depression in the stem ofthe fitting provided with a suitable gasket, and the cap screweddown. The thermometer is thus held securely in position, and asteam-tight closure is easily made. 8 BULLETIN 956, U. S. DEPARTMENT OE AGRICULTURE. It will be seen, therefore, that the test can is firmly attached to theco
. A study of the factors affecting temperature changes in the container during the canning of fruits and vegetables . s passed through the brass fitting by way of a f-inch hole until thebulb reaches the center of the test can, as determined by carefulmeasuring beforehand, the funnel-shaped depression in the stem ofthe fitting provided with a suitable gasket, and the cap screweddown. The thermometer is thus held securely in position, and asteam-tight closure is easily made. 8 BULLETIN 956, U. S. DEPARTMENT OE AGRICULTURE. It will be seen, therefore, that the test can is firmly attached to thecover of the retort by means of the brass fitting, and the can may beplaced in or removed from the retort in a very few seconds by simplyputting on or taking off the cover. Owing to the small size of theretort, equilibrium at any steam pressure desired may be attained in 10 to 3 0 top of the mer-cury column is al-ways in sight, andthe temperature atthe center of the con-tainer may be readdirectly at any 1 shows thearrangement of theapparatus and theposition of the test-can in the retort. t^. p/?esso#£ STEM//A7*A-£r. THE BRASS FITTING. The accompanyingillustrations (fig. 2)show in detail thestructure of the spe-cial fitting to whichthe can is attachedfor the test. Nu-merous modificationsof this are possible,to suit all original form isshown at A. Thethreaded stem screwsinto the cover of theretort until the hex-agonal shoulderpresses upon thegasket and forms asteam-tight joint with the retort cover. The threaded portion belowthe shoulder screws into the hole of the ordinary maximum ther-mometer test can in common use. With suitable gaskets air-tightjoints are made, and the can may be attached or removed as of this type were used largely in these investigations. Thewhich the thermometer is passed is reamed out /VKWi/jr- Fig. 1.—Apparatus designed for making time-temperaturetests in canning food products, showing the position ofthe t
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectcanning, bookyear1921
