696 



ice-pits. A house was over the whole ; 

 rather for excluding rain than air. The 

 sides of the house were five or six feet 

 high. The eaves were boarded up, but not 

 close, and the principal vent was at the top 

 of a pavilion roof. 



Straw is a considerable resister or non- 

 conductor of heat. Let it be clean, sound, 

 and dry. Tread it down close between 

 the logs and bank. Lay an abundance of 

 it upon the ice. The small mass of ice 

 stored in the above insulated pen, 700 feet, 

 was daily used of very freely, and lasted 

 near as long as double the quantity stored 

 in a close ice-pit as commonly constructed, 

 and which is on the hill in Union-street, 

 Philadelphia ; the earth whereof is dry and 

 gravelly from near the surface down to the 

 bottom. 



Below is a section, drawn of an insulated 

 Ice-pit, differing from the one above-men- 

 tioned only in size. The pen or cell inside 

 of the logs, is twelve feet square, ten deep, 

 and contains 1440 solid feet, The space 



