69t 



between the logs and the bank, at bottom 

 is one foot ; the same at top is near three 

 feet. The sink for receiving water from 

 the melting ice need be only five or six 

 inches deep, and seven or eight feet square. 

 Logs are laid across it. An ice-pit of 

 1400 solid feet, if insulated^ would keep 

 more ice than any private family could 

 want ; supposing the pit is not deeper than 

 ten feet, and the ground is dry. A pit 

 eleven feet square and ten deep contains 

 1200 feet. If this should not be sufficient^ 

 in another year heap on it a foot more in 

 thickness: it will then be 13 20 solid feet. 

 Another foot makes 1440; and another 

 foot 150o. These additions are above 

 ground. Ice, in ice-houses, melts more at 

 the bottom and sides than on the top ; un- 

 less it may be otherwise in very close pits 

 seldom opened. A pen of ten feet cube, 

 and three feet height of ice added at the 

 top, gives 1300 solid or cubic feet ; and 

 the house over it need be but seventeen or 

 eighteen feet square. 



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