[ Si ] 



branches in the room of a fick per- 

 fon, by cooling the air 9 which is 

 owing to the evaporation of moif. 

 ture ; but I fhould now apprehend 

 rather fome mifchief from them in 

 a room whofe doors and windows 

 are fhut, and which is not well 

 lighted. At any rate, I fhould no 

 more allow them to be kept in the 

 night-time in the room of any of 

 my own patients. 



Is it not fome what probable, that 

 among thofe people who are found 

 dead in their bed without any pre- 

 vious illnefs, fome may owe their un- 

 timely end to fome fuch concealed 

 caufe, which nobody ever fufpected 

 to be in any way dangerous ? 



But the mifchief which trees in 

 reality do by night-time to the fur- 

 rounding air, cannot do any ob- 

 ferveable harm to animals: for 

 E 2 thofe 



