336 
MR. J. WELSH’S ACCOUNT OF METEOROLOGICAL 
uniform with the height. deduced by equation (1 .), we infer from 
Confining our attention now decrease of temperature, below the stratum 
them that in each series the above that stratum ; the ratio 
where the disturbing influence exists, is 
of the rate of decrease in the lower division to that in the higher, being 
On Aug 17. 1-067 ; on Aug. 26, 1-058 ; on Oct. 21. 1-061 ; and on Nov. 10, 1 234. 
X, in order to obtain the "o^^ 
freed from disturbing causes, we allow to the lowei have 
donal to the spaces within wMch the obse— fo, -J “ “ 
the following numbers repiesentmg 
height ; — 
Aug. 17 • • • 
rbe values for the first three series being almost identical; that for the fourth 
diff-ering from them by Ath of the f diminution of tempe- 
It may be convenient to give here the results for ‘h® 
rature obtained hy^ different —s “ 070^^0 
3-434 
3-440 
Oct. 21 
Nov. 10 
3-431 
3-205 
ENHEIT. 
From the whole series . . • 
From first and last groups only 
From lower division . . • 
From upper division . . • 
Mean of two divisions 
Aug. 17. 
322-9 
316-3 
277-9 
296-5 
292-0 
Aug. 26. 
Oct. 21. 
Nov. 10. 
382-0 
436-5 
400-6 
358-8 
411-9 
374-7 
281-8 
279-3 
266-0 
298-1 
296-2 
328-3 
290-7 
291-5 
312-0 
Mean oi two ^ ^ ^ 
§ 6. Variation of the Hygrometric Condition of the Air. 
As the amount of aqueous vapour in the air ;'“f„77is- 
sr^ieTr— 
conveniently studied by examining the results for t 1 that which it 
=::jrrrz:i"; :s it 
