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241 Anatyfis of the Air. 



of water. I marked the boundary of air 

 and water, and then immerfed the whole 

 receiver, which had the breath in it, under 

 water, and there gradually poured the con- 

 tained breath up into the other full receiver, 

 which flood inverted over o s ; whereby I 

 could readily find, whether the air had loft 

 any of its elafticity : And for greater furety, 

 I alfo meafured the bulk of breath by filling 

 the receiver with a known quantity of water 

 up to the above mentioned mark j makin 



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alfo due allowance for a bulk of air, equal 

 to the capacity of the large fyphon s b, 

 which was at laft fucked full of water. 



i 



The event was, that there was 1 8 cubick 

 inches of air wanting 5 but as thefe receivers 

 were much too fmall to make the Experi- 

 ment with accuracy ; that fomc allowance 

 may be made for errors , I will fet the lofs 

 of elaftick air at 9 cubick inches, which is 

 but r ~ part of the whole air refpired, which 

 will amount to 353 cubick inches in one 

 hour, or 100 grains, at the rate of 48000 

 cubick inches infpired in an hour, or one 

 ounce and a half in twenty four hours. 



By pouring the like quantity of air to and 



fro under water, I found that little or none 



of 



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