276 



Abstracts of the Makeestoun Observations, 1843. 



From the periods for the four astronomical seasons, it is evident that the minimum humidity occurs earlier 

 ill Summer than in the preceding and succeeding quarters. For the astronomical seasons, the minimum hu- 

 midity occurs after the maximum temperature of the air in Spring and Autumn, while it occurs before the 

 maximum temperature in Summer and Winter. In the mean for the year, the minimum humidity occurs 

 aliout 20™ after the maximum temperature, and about 50™ after the maximum pressure of aqueous vapour. 

 The secondary maxima and minima, shewn in some of the monthly means for the pressure of aqueous vapour, 

 have no counterparts in the means for the humidity. 



The ascending or forenoon branches of the diurnal curves of temperature and pressure of aqueous vapour 

 exhibit more rapid changes than the afternoon or descending branch ; while, for the humidity, the afternoon or 

 ascending branch has the most rapid variations. In the mean for the year, however, the variation is but slightly 

 more rapid in the afternoon than in the forenoon branch. These remarks have reference to the portion of the 

 diurnal curve included in the limits of the observations for 1843, viz., 5 a,m. till 9 p.m. 



The mean hiimidity for the year occurs at S** 28™ a.m. 

 *• • 6J> 40™ P.M. 



The interval between these periods is, 10'' 12" 



Diurnal Range of Humidity. — The diurnal ranges, as far as can be judged from Table XIV, 

 w'hsit less in the summer months than in the months immediately preceding or succeeding them. 



are some- 



TABLE XV.— Daily, Weekly, and Monthly Means of the Height of the Barometer in 1843. 



Civil 

 Day. 



Jan. 



Feb. 



March. 



April. 



May. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 





in. 



ill. 



in. 



ill. 



in. 



in. 



in. 



in. 



in. 



in. 



in. 



in. 



1 



[ ] 



29-256 



29-630 



29-026 



30-184 



29-335 



29-558 



29-505 



30059 



[29-677] 



29-515 



29-903 



2 



29-901 



29-093 



29-881 



[29-243] 



30-070 



29-055 



[29-5301 



29-264 



30-078 



29-700 



29-645 



29-894 



3 



29-880 



28-914 



30-015 



29-369 



29-717 



26-189 



29-471 



29-130 



[30-060] 



29-780 



29-358 



[29-834] 



4 



29-460 



29-469 



30-108 



29-185 



29-399 



[29-400] 



29-661 



29-190 



30-075 



29-767 



29-328 



29-945 



5 



29-603 



[29-559] 



[30-008] 



29-382 



29-270 



29-682 



29-458 



29-424 



30-146 



29-684 



[29-385] 



29-545 



6 



29-713 



29-856 



29-929 



29-318 



29-272 



29-693 



29-379 



[29-545] 



30-046 



29-204 



29-424 



29-810 



7 



29-292 



30-026 



29-991 



29-050 



[29-544] 



29-449 



29-579 



29-826 



30-042 



29-056 



29-232 



29-678 



8 



[29-108] 



29-997 



30-125 



29-132 



29-585 



28-848 



29-695 



29-838 



30-032 



[29-295] 



29-325 



29-868 



9 



28-967 



29-987 



30-098 



[29-429] 



29-756 



28-838 



[29-734] 



29-865 



29-962 



29-337 



29-585 



29-995 



10 



28-443 



29-978 



29-806 



29-678 



29-982 



29-429 



29-864 



29-926 



[29-997] 



29-537 



29-323 



[29-943] 



11 



28-632 



30-007 



29-847 



29-763 



29-976 



[29-502] 



29-999 



29-993 



29-823 



28-952 



29-838 



29-950 



12 



28-669 



[29-757] 



[29-623] 



29-631 



29-796 



29-983 



29-891 



30-022 



30-111 



29-060 



[29-770] 



30-119 



13 



28-022 



29-777 



29-218 



29-693 



29-498 



29-956 



29-841 



[29-920] 



30-011 



29-290 



29-957 



30-047 



14 



28-389 



29-550 



29-196 



29-473 



[29-614] 



29-961 



29-805 



29-886 



29-788 



29-544 



30-080 



29-953 



15 



[29-049] 



29-242 



29-572 



28-745 



29-401 



29-975 



29-739 



29-830 



29-746 



[29-409] 



29-836 



29-845 



16 



29-453 



29-107 



29-722 



[29-693] 



29-397 



29-916 



[29-699] 



29-861 



29-781 



29-368 



29-800 



30-054 



17 



29-777 



29-420 



29-520 



29-778 



29-618 



29-884 



29-848 



29-890 



[29-837] 



29-371 



29-384 



[30-027] 



18 



29-985 



29-550 



29-665 



29-791 



29-830 



[29-8771 



29-506 



29-875 



29-818 



29-824 



29-073 



30-187 



19 



30-169 



[29-340] 



[29-473] 



29-679 



29-856 



29-839 



29-454 



29-649 



30-044 



30-105 



[29-226] 



30-134 



20 



30-014 



29-327 



29-550 



29-519 i 29-749 



29-911 



29-317 



[29-567] 



29-844 



29-803 



29-094 



29-992 



21 



29-730 



29-325 



29-219 



29-561 [29-690] 



29-738 



29-360 



29-597 



29-924 



29-602 



29-042 



30-036 



22 



[29-725] 



29-310 



29-163 



29-548 



29-555 



29-809 



29-362 



29-137 



30-238 



[29-564] 



28-963 



29-784 



23 



29-535 



29-390 



29-250 



[29-495] 



29-601 



29-852 



[29-601] 



29-255 



30-323 



29-503 



29-192 



29-934 



24 



29-365 



29-551 



29-594 



29-775 



29-549 



29-862 



29-793 



29-502 



[30-015] 



29-240 



29-343 



[30-019] 



25 



29-538 



29-570 



29-860 



29-270 



29-320 



[29-736! 



29-938 



29-520 



30-100 



29-129 



29-395 



30-136 



26 



29-616 



[29-397] 



[29-683] 



29-298 



29-243 



29-742 



29-839 



29-625 



29-900 



29-257 



[29-438] 



30-102 



27 



29-372 



29-027 



29-800 



29-580 



29-141 



29-627 



29-725 



[29-633]' 29-603 



29-280 



29-087 



30-121 



28 



29-260 



29-216 



29-774 



29-390 ;[29-456] 



29-525 



29-678 



29-530 I 29-638 



28-586 



29-643 



30-180 



29 



[29-340] 





29-822 



29-565 i 29-710 



29-525 



29-237 



29-688 29-679 



[29-192] 



29-967 



30064 



30 



29-218 





29-436 



[29-751] 29-776 



29-506 



[29-495] 



29-931 , 29-500 



29-256 



29-909 



29-769 



31 



28-316 





29-063 



29-546 





29-564 



29-956 1 



29-259 





[29-683] 



Mean 



29-358 



29-498 



29-661 



29-488 



29-622 



29-620 



29-637 



29-656 



29-935 



29-404 



29-475 



29-963 



