Atmospheric Pressure. 



419 



Diurnal Ranges of the Hourly Variations of Humidity for each Month. — The ranges for each month from 

 Table XVI. are- 



Jan. 

 0-081 



Feb. 



0-138 



March. 



0-186 



April. 



0-266 



May. 



0-285 



June. 



0-216 



July. 



0-251 



Aug. 

 0-258 



Sept. 



0-228 



Oct. 



0-170 



Nov. 

 0-080 



Dec. 

 0051 



The diurnal range is least in December and is greatest in April and August. The mean range of the diurnal 

 variation of humidity is less for the midsummer months, June and July, than for the two preceding or two suc- 

 ceeding months. 



The Extremes of Daily Mean Humidity and their Ranges are as follow for each month of 1 844 : — 



June. July. Aug. Sept. Oct. Nov. Dec. 



0-951 0-937 0-920 0-967 0-941 0-974 0-995 

 0-723 0-716 0-724 0-743 0758 0-719 0-822 





Jan. 



Feb. 



March. 



April. 



May. 



Greatest 



0-986 



0-969 



0-947 



0-917 



0-921 



Least, 



0-756 



0-765 



0-751 



0-604 



0-628 



Ranges, 0-230 0-204 0-196 0-313 0-293 0-228 0-221 0-196 0-224 0-183 0-255 0-173 



The greatest daily mean of relative humidity occurred on the 19th December when the air was nearly satu- 

 rated, and the least occurred on the 30th April when the air contained only t 6 q of its capacity. The greatest 

 range of diurnal means for a month, is that for April, and the least is that for December. 



Atmospheric Pressure. 

 TABLE XVIIL— Daily, Weekly, and Monthly Means of the Height of the Barometer in 1844. 



Civil 

 Day. 



Jan. 



Feb. 



March. 



April. 



May. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 





in. 



in. 



in. 



in. 



in. 



in. 



in. 



in. 



in. 



in. 



in. 



in. 



1 



29-224 



29-725 



28-828 



29-936 



30-208 



29-886 



29-645 



29-302 



[30-011] 



29-592 



29-508 



[29-941] 



2 



29-433 



29-429 



28-818 



29-638 



30-226 



[29-812] 



29-670 



29-502 



30-098 



29-169 



29-433 



29-890 



3 



29-432 



29-804 



[29-220] 



29-445 



30-094 



29-856 



29-640 



29-314 



30-070 



29-266 



[29-405] 



30-047 



4 



29-389 



[29-377] 



29-266 



29-427 



30-146 



29-750 



29-556 



[29-292] 



30040 



29-553 



29-342 



30142 



5 



29-038 



29-235 



29-542 



29-472 



[29-924] 



29-531 



29-490 



29-539 



29-898 



29-426 



29-270 



30-015 



6 



28-851 



29-238 



29-688 



29-818 



29-678 



29-367 



29-617 



29-102 



29-716 



[29-388] 



29-224 



30-019 



7 



[29-492] 



28-833 



29-983 



[29-828] 



29-647 



29-352 



[29-593] 



28-992 



29-595 



29-647 



29-234 



30-112 



8 



29-774 



28-761 



29-798 



30077 



29-751 



29-600 



29-652 



29-100 



[29-663] 



29-486 



29-049 



[30-016] 



9 



29-982 



28-918 



29-393 



30-170 



29-733 



[29-586] 



29-654 



29-350 



29-520 



28-948 



28-739 



30-060 



10 



29-921 



29-424 



[29-503] 



30-003 



29-718 



29-640 



29-589 



29-418 



29-564 



28-853 



[29-032] 



30-074 



11 



30-084 



[29-371] 



28-993 



29-600 



29-879 



29-838 



29-477 



[29-277] 



29-685 



29-254 



28-878 



29-814 



12 



29-852 



29-731 



29-175 



29-478 



[29-971] 



29-720 



29-558 



29-362 



29-744 



29-309 



29066 



29-763 



13 



29-940 



29-769 



29-675 



29-357 



30-117 



29-399 



29-347 



29-308 



29-862 



[28-937] 



29-228 



29-472 



14 



[30-018] 



29-625 



29-566 



[29-637] 



30-168 



29-493 



[29-546] 



29-125 



29-731 



28-824 



29-769 



29-434 



15 



30-168 



29-537 



29-325 



29-653 



30-210 



29-639 



29-524 



29-425 



[29-704] 



28-619 



29-533 



[29-472] 



16 



30-067 



29-740 



29-688 



29-874 



29-904 



[29-610] 



29-687 



29-564 



29-437 



28-763 



29-830 



29-338 



17 



30-000 



29-671 



[29-629] 



29-860 



29-842 



29-841 



29-683 



29-423 



29-859 



29-035 



[29-754] 



29-261 



18 



29-830 



[29-461] 



29-982 



29-910 



29-924 



29-595 



29-481 



[29-523] 



29-589 



29-410 



29-819 



29-567 



19 



29-625 



29-088 



29-739 



30-015 



[29-976] 



29-696 



29-571 



29-792 



29-928 



29-241 



29-796 



30-081 



20 



29-777 



29-483 



29-476 



29-966 



29-985 



29-627 



29-886 



29-501 



30013 



[29-387] 



29-777 



30-286 



21 



[29-786] 



29-245 



29-675 



[29-876] 



30-049 



29-500 



[29-717] 



29-432 



30-078 



29-377 



30-079 



30-314 



22 



29-713 



29-332 



29-279 



29-869 



30-154 



29-447 



29-861 



29-390 



[29-943] 



29-630 



30-018 



[30-166] 



23 



29-858 



29-197 



29-328 



29-759 



30-101 



[29-536] 



29-759 



29-386 



29-810 



29-631 



29-875 



30-118 



24 



29-913 



29-028 



[29-378] 



29-736 



29-981 



29-499 



29-745 



29-539 



29-876 



29-655 



[29-927 1 , 



30128 



25 



29-831 



[29-097] 



29-079 



29-859 



30015 



29-542 



29-750 



[29-633] 



29-955 



29-770 



29-831" 



30-068 



26 



29-979 



28-764 



29-355 



29-783 



[30-030] 



29-604 



29-800 



29-750 



29-906 



29-943 



29-925 



29-906 



27 



29-859 



29-109 



29-554 



29-997 



30-147 



29-665 



29-948 



29-833 



29-816 



[29-838] 



29-835 



29-830 



28 



[29-641] 



29- 152 



30-081 



[30-011] 



30-018 



29-746 



[29-631] 



29-903 



29-701 



30-070 



29-685 



29-706 



29 



29-410 



29- 177 



30-243 



30-078 



29-920 



29-835 



29-691 



29-901 



[29-685] 



29-910 



29-861 



[29-868] 



30 



29-290 





30-216 



30-140 



29-911 



[29-700] 



29-320 



29-912 



29-926 



29-682 



30-021 



29-817 



31 



29-475 





[29-926] 





29-938 





29-275 



30-046 





29-652 





29-918 



Mean 



29-693 



29-321 



29-529 



29-805 



29-980 



29-627 



29-625 



29-489 



29-817 



29-397 



29-563 



29-892 



