62 
Proceedings of the Royal Society of Edinburgh. [Sess. 
U 
Temperature. 
Steady 
Increased. 
U nchanged. 
Pressure 
I n 
creased. 
Upward M 
o v e 
ni e n t. 
Condi- 
t i o n s 
Density 
Den 
si by 
Un- 
Reduced. 
In 
creased. 
changed. 
Entropy 
E n t 
ropy 
Increased. 
Re 
d u c e d. 
H = 
= X 
H = 
= y 
Pressure 
R e 
d u c e d. 
Downward 
M o 
v e m e n t. 
Condi- 
tions 
Density 
Den 
sity 
Un- 
Increased. 
R e 
d u c e d. 
changed. 
Entropy 
E n t 
ropy 
Reduced. 
In 
creased. 
T e m p e 
rat 
u r e. 
Steady. 
Decreased. 
U nchanged. 
U 
U 
Fig. 1. — First effects of Temperature Changes which do not make the Lapse Rate exceed the 
Adiabatic Lapse Rate. 
f H gdH = [ x gdK ft 
Jo 0 Jo 6 
gd_R 
0 
is diminished over A and increased over C. 
Therefore by equation 6, over A p is increased, over C p is diminished. 
For values H >y, 
f H gd H_ t'gd H fygd H ft 
Jo 0 Jo 0 + Jx 0 jy 
ydR 
IT' 
and the middle term is diminished over A, but increased over C by the 
change of 0, the other terms being unaffected. Hence f 
J o 
H gdH . 
6 
is altered as 
