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Feeding Bottle: In a similar though vastly more complex way, man has the potentialities for calm assurance or gnawing anxiety, for love or hate, for feelings of satisfaction and accomplishment or for inferiority and frustration. Any of these may develop, depending largely upon the parental figure who provides the setting for this maturing process (1, 1953). The child's constitution and his total environment, especially his personal relations, are more important for personality development than any single factor such as breast-feeding bottle or bottle-feeding bottle.
Dewar's double-walled bottle was designed to minimize transmission of heat by conduction, convection, and radiation. (See HEAT TRANSFER.) He reduced conduction and convection losses from the inside bottle by surrounding it with a vacuum space, and he reduced radiation losses by silvering the outside wall of the inside bottle and the inside wall of the outside bottle. There was always a small residual conduction loss across the support bridge which held the inside bottle within the outer jacket, but by making the walls of the vessel thin and also by making the bridge between the two sections small, he was able to reduce this loss to a minimum. |
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