Colonel Beaufo'y on the Diurnal Variation of the Needle. 373 
tive humidity of the atmosphere, and the quantity of evapora- 
tion. My journal for 1817 does not exhibit the range of the 
barometer, but in other respects it gives results almost exactly , 
the same as the above. The mean daily range of the thermo- 
meter for that year is 12.4. I am, Sir, yours, &c. 
Feh. 26. 1820. Robert Gordon. 
Art. XXXI. — Quarterly Abstract of the Diurnal Variation 
of the Magnetic Needle. By Colonel Beaufoy, F. R. S. 
Monthly mean Variation of the Magnetic Needle, 
Variation West. 
1817. 
1818. 
1819. 
Nov. 
J Morning, 
24° 31' 49" 
24° 33' 24" 
24° 32' 42" 
( Noon, 
24 37 55 
24 41 41 
24 38 43 
Dec. 
j Morning, 
24 34 03 
24 37 04 
24 33 29 
( Noon, 
24 38 02 
24 41 20 
24 37 20 
1818. 
1819. 
1820. 
Jan. 
f Morning, 
24° 34' 02" 
24° 35' 42" 
24° 34' 06" 
( Noon, 
24 39 57 
24 39 54 
24 37 54 
Owing to the shortness of the days, the evening observations 
were discontinued. 
Bushey Heath, Stanmore, ) 
Feb. 9. 1820. j 
Art. XXXII . — Proceedings of the Royal Society of Edin- 
burgh. (Continued from p. 181.) 
Dec. 20. 1819.— A PAPER was read by Henry Mackenzie, 
Esq. On the English Poets^ considered with reference to their 
lyrical Poems. This paper was an Appendix to his account of 
Mr John Home, and was prefaced with a short notice of the 
loss which the Society had suffered in the death of two of its dis- 
tinguished members. Lord Webb Seymour and Mr Playfair. 
