CONTENTS. vii 
XIII. ^he Juppofed Effedi of boiling upon Water, in difpojing 
it to freeze more readily, afcertained by Experiments, 
By Jofeph Black, M. D, Profejfor of Chemijiry at Edin- 
burgh, in a Letter to Sir John Pringle, Bart, P, R, S,. 
p. 124 
XIV. Experiments on the Lipping Needle, made by Lejire 
of the Royal Society, By Thomas Hutchins, p. 127 
XV. A Meteorological Journal for the Tear 1774, kept at 
,the Royal Society s Houfe by Order of the Prefident and 
Council, p. 139 
PHILO- 
