[ 6i 7 3 
Wilfon , Mr. His account of an extraordinary degree of cold at Glafgow in January, 
1780. Some experiments and obfervations on -the comparative temperature of 
hoar-froft, and the air near to it, p. 451. 
Wind . Effects of the Eaif -wind, at Senegal, p. 484. 
Wires . Effects of electricity in ftiortening them, p. 334. Iron wire refills the paffage 
of the eledtric fluid more than copper, p. 337. 
Wool.. Improvement propofed in dying it, p. 350.. 
FROM THE PRESS OF J. NICHOLS. 
MDCCLXX X . 
I !’S 
