

[ i 











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6z Vegetable Statich. 



ters anfwer nearly to the following fa 

 grees of heat above the freezing point, *vj%< 

 Melon-thiftle 31, Ananas 29, Piamento 26 

 Euphorbium 24, Cereus 2ir, Aloe 19, i n . 

 dian-tig \6~ } Ficoides 14, Oranges i 2 

 Miftles 9. 



Mr. Boyle, by placing a Thermometer in 

 a cave which was cut ftrait into the bot- 

 tom of a cliff, fronting the Sea, to the depth 

 of 1 3 o feet , found the fpirit ftoo'd both in 

 winter and fummer at a fmall divifion a. 

 bove temperate; the cave had 80 feet depth 

 of earth above it. Boyle's JVorks y Vol. III. 

 p. 54. 



I marked my 6 Thermometers numerical- 

 ly > i> 2, 3, 4, 5, 6. The Thermometer 

 numb. 1. which was fhortcft, I placed with 

 a South afped, in the open air ; the ball 

 of numb. 2, I fet two inches under ground 5 

 that of numb. 3, four inches underground, 

 numb. 4, s inches; numb. 5, 16 inches; and 

 numb. 6, 24 inches under ground. And that 

 the heat of the earth, at thefe ieveral depths, 

 may the more accurately be known, it is ' 

 proper to place near each Thermometer a 

 glafs-tube fealed at both ends, of the fame 

 igth with the items of the feveral Ther- 



mometers ; 





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