54 RESULTS OF MAKERSTOUN OBSERVATIONS, 1845. 
TABLE XXIII.—Extreme Readings of the Barometer for each Month in 1845; Extreme Daily 
Heights for each Month; and Extreme Diurnal Ranges for each Month, together with the 
Ranges and Means of the Extremes. 
Extreme Readings. | Extreme Daily Means. Extreme Diurnal Ranges. 
Month. | = S| 
Lowest. Mean. Highest. Lowest. Range. | Mean, Greatest. 
in. aS. co lpdeean: pelea in. oan a. in. in. in, 4. am 
30-052 18 |28-809 29-430|| 1 | 30-031] 28 | 28-876] 1-155 |29-453|) 25 |0-730 
30-077 17 |29-213 29-645 30-006 29.285| 0-721 | 29.645 || 24 |0-568 : 
30-244) 27 21 |28-839 29-541 | 30-185 29-051) 1-134 |29-618 0-618 | 
30-289] 9 4/28-860 29-574 | 30-255 28-910] 1-345 |29.582 0-684 
30-161| 1 29-225 29-693 30-123 29-257) 0-866 |29-690 0-395 | 
30-072| 3 11/|28-874 29.473 | | 30-047| 6 | 29.038) 1-009 | 29-542 0-565 
30-003) 1 5|28-727 29.365 | 29.976 | 29-055) 0-921 |29-515 0-706 
30-175 29.008 29-591 30-146 29-126) 1-020 | 29-636 0-397 
30-162 2|28.781 29.471 30-094 28-839, 1.255 |29-466 0-721 
30-177 } 28-946 29.561 | 30-139 29:052| 1.087 |29-595 0-489 
30-138 28.239 29-188 30-103 28-441| 1-662|29.272 0-658 
30-284 28-282 29-283 || 13 | 30-191 28-583 1-608 |29-387 |) 23 |1-147 
TABLE XXIV.—Hourly Variations of the Pressure of Dry Air for each Astronomical Quarter, 
and for the Year 1845. 
Feb. 
March. 
April. 
in. 
| 0-016 
‘O11 
004 
-000 
002 
-005 4 d | 
‘009 
-014 
‘019 
“021 
023 
-023 
0 
1 
2 
3 
4 
5 
6 
7 
8 
9 
_ 
o 
= 
= 
