. Railway mechanical engineer . oranges in a car having box bunkers withopen bulkheads, and without a rack on the floor, had 23,200lb. of ice put into the bunkers between Los Angeles and NewYork. A similar car provided with basket bunkers, insu-lated bulkheads, and a floor rack had 18,675 lb. Neitherload was precooled. That precooling of the lading means fewer icings in tran-sit is a matter of common knowledge. That by hard freezing The temperature records show that the poultry grew gradu-ally warmer, faster on the top and bottom of the load, wherethe heat leakage from roof and floor was most
. Railway mechanical engineer . oranges in a car having box bunkers withopen bulkheads, and without a rack on the floor, had 23,200lb. of ice put into the bunkers between Los Angeles and NewYork. A similar car provided with basket bunkers, insu-lated bulkheads, and a floor rack had 18,675 lb. Neitherload was precooled. That precooling of the lading means fewer icings in tran-sit is a matter of common knowledge. That by hard freezing The temperature records show that the poultry grew gradu-ally warmer, faster on the top and bottom of the load, wherethe heat leakage from roof and floor was most pronounced,and most slowly in the center of the load, where the packagesprotected one another. The chart also shows that the amountof salt added during transit is insufficient to maintain thetemperatures produced on the initial salting, when the full10 per cent of the weight of the ice was present. It must beremembered that the salt bores through the ice and escapesas brine more rapidly than the bulk of the ice melts, hence it. Fig. 6 of the goods, they not only do not require additional chillingin transit, but actually furnish refrigeration to the car, is notso commonly recognized. Fig. 6 shows the temperatures intransit of 20,000 lb. of poultry, which went into the car atzero F. The railroad icing record shows that 4,700 lb. ofice was added during the eight-day haul and 470 lb. of experiments, under comparable conditions, show thatnearly 5,000 lb. of ice is used by cars carrying 20,000 lb. ofpoultry chilled to 30 to 32 deg. F. during a four-day haul, orapproximately twice as much. is in constantly decreasing proportion. Icing and saltingrules take no account of this fact. It is quite obvious thatdifferent rules must be formulated if efficiency is to besecured. This problem, like all the other problems confront-ing the shipper and the carrier who are engaged in gettingperishables to market in good condition, can be solved onlyon the basis of exact knowledge. That kn
Size: 1608px × 1554px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
