THE 



PHILADELPHIA 



MEDICAL AND PHYSICAL JOURNAL. 



I. Obser'oations and Experiments on the extraordinary 

 degree of Cold, at Northampton fa midland county 

 in England J, during the Intense Frost of 1776-7. 

 With Remarks on the Climate of London, Philadel- 

 phia, £s?c. In a letter to a friend. By A. Fother- 

 GiLL, M, D.y F. R. S,, ^c.j and by him communi- 

 cated to the Editok. 



" Vides ut alta stet nive candidum 

 Soracte ; nee jam sustineant onus 

 Silvac laborantes ; geluque 

 Flumina constiterint acuto !" 



Horace, 



In compliance with your request, my dear friend, I 

 shall now lay before you some account of my obser- 

 vations and experiments, made during the uncom- 

 monly severe frost of 1776-7. As some of the phe- 

 nomena appeared to me not a little surprizing, I 

 minuted them down at the time they occurred. 



