appendix. 361 
where Elm Pipes lay under Ground ; a plain 
Proof that thefe Drains intercepted the 
Warmth of the Earth, from afccnding from 
greater Depths below them 5 for the Snow 
lay where the Drain had more than four 
Feet depth of Earth over it. It continued 
alfo to lay on Thatch, Tiles and the Tops 
of Walls. 
FINIS. 
