. Department bulletin. Agriculture; Agriculture. EVAPORATION OF FRUITS. 29 than over, the trays, and great differences in temperature and in the drying rate between the upper and the lower portions of the tunnel existed, with the result that it was necessary to shift the trays from the upper runways to ]ower positions in order to hasten the drying. These defects of the older tunnel driers are entirely remedied by the expedient of giving the tunnel 3 feet of additional length and off- setting, or banking, the trays. THE FURNACE ROOM. For a group of three tunnels heated by a single furnace, as i
. Department bulletin. Agriculture; Agriculture. EVAPORATION OF FRUITS. 29 than over, the trays, and great differences in temperature and in the drying rate between the upper and the lower portions of the tunnel existed, with the result that it was necessary to shift the trays from the upper runways to ]ower positions in order to hasten the drying. These defects of the older tunnel driers are entirely remedied by the expedient of giving the tunnel 3 feet of additional length and off- setting, or banking, the trays. THE FURNACE ROOM. For a group of three tunnels heated by a single furnace, as is the prevailing practice, the furnace room has a width equal to that of. 1 PIPE 3 Tv/i/Meif Aoove- /| K 3 tunnels Above HBAreK 3 Tl/NIVEU ABOVE\ /teATe/i \ AcArrat/f P st/ewre »*• /sm>.«? Afreet ArAVe &i/v A^OOS? to oreNWe To o?fr/r I 'i ft A MP . *£ FIg. 12.—First-floor plan of the tunnel drier. the group of tunnels and a length 2 feet greater. This additional 2 feet of length is given at the lower end of the tunnels and permits the furnace to be placed directly beneath the opening in the floor of the central tunnel, as shown in Figures 11 and 12. The height to the. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. Washington, D. C. The Dept. : Supt. of Docs. , G. P. O.
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Keywords: ., bookauth, bookcentury1900, bookdecade1920, booksubjectagriculture
