If one reads John Robins' A Diet for a new America, one will be able to do without the ice cream, as it will be to repulsive to eat the stuff!!!!
Yes, Robins of Baskin-Robins!  Great book for the health conscious!  ISBN 0915811812
 m2cw  on this thread.   m

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Dry ice would be too expensive; going to a nearby Ice Cream joint defeats my purpose; I want to have ice cream out in the middle of nowhere!!