410 



Results of Makeestoun Obseevations, 1844. 



Diurnal Range of the Hourly Means of the Tension of Aqueous Vapour. — The following are the ranges of 

 the hourly means for each month of 1844 : — 



Jan. Feb. March. April. May. June. July. Aug. Sept. Oct. Nov. Dec. 



in. 



0-031 



in. 



0-021 



in. 



0-029 



in. in. in. 



0-044 0-042 0-056 



in. 



0-050 



in. 



0-052 



in. 



0-061 



0-041 



in. 



0-015 



in. 



0-015 



The diurnal range is greatest in September and least in November and December, 

 for each of the astronomical quarters and for the year are — 



The diurnal ranges 



Winter, 0-018 Spring, 0-029 Summer, 0-046 Autumn, 0-048 Year, 0-033 



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

 Jan. Feb. March. April. May. June. July. Aug. Sept. Oct. 



Greatest, 0-311 0-263 

 Least, 0-147 -0-126 



0-298 

 0-151 



0-355 

 0-197 



0-336 

 0-188 



0-466 +0-489 

 0-285 0-303 



0-420 

 0-271 



0-479 

 0-253 



0-336 

 0-215 



Nov. 

 in. 



0-340 

 0185 



Dec. 

 in. 



0-237 

 0-136 



Range, 0-164 0-137 0147 0-158 0-148 0-181 0186 0149 +0-226 0-121 0-155 -0101 



The maximum and minimum of daily mean pressure for the year are indicated by + and — and the greatest 

 and least monthly ranges of the daily means are similarly marked. 



Relative Humidity. 



TABLE XIV.— Mean Relative Humidity for each Civil Day, Week, and Month of 1844, 



Saturation being = 1. 



Civil 

 Day. 



Jan. 



Feb. M 



arch. A 



pril. J 



lay. J 



une. J 



uly. 



Lag. £ 



ept. ( 



Jet. I 



^ov. 



Dec. 



1 



0-913 



0-829 



858 



859 



628 



863 



849 



828 [0 



815] 



803 



745 



[0-910] 



2 



•919 



•969 



845 



873 



706 [ 



837] 



748 



790 



769 



763 



719 



•950 



3 



■864 



•909 [ 



826] 



861 



700 



723 



828 



870 



899 



758 [ 



829] 



•957 



4 



•986 



[ -919] ■ 



830 



917 



916 



811 



855 [ 



836] 



850 



768 



826 



•915 



5 



•975 



•938 



791 



906 [ 



750] 



904 



833 



814 



891 



889 



914 



•969 



6 



•962 



•959 



783 



868 



734 



825 



873 



848 



961 [ 



801] 



949 



•965 



7 



[ -956] 



•908 



809 [ 



857] 



735 



858 [ 



837] 



865 



894 



782 



946 



•913 



8 



•949 



•893 



896 



863 



711 



750 



764 



796 [ 



861] 



808 



957 



[ -952] 



9 



•919 



•923 



826 



892 



747 [ 



781] 



864 



747 



809 



804 



904 



•979 



10 



•944 



•831 [ 



821] 



699 



894 



752 



834 



766 



771 



832 [ 



913] 



•937 



11 



•948 



[ -911] 



838 



681 



921 



735 



751 [ 



811] 



843 



896 



855 



•948 



12 



•932 



•928 



806 



851 [ 



794] 



764 



753 



841 



743 



903 



869 



•868 



13 



•908 



■955 



751 



743 



711 



812 



894 



889 



831 [ 



859] 



948 



•874 



14 



[ -947] 



•939 



757 [ 



759] 



782 



760 [ 



793] 



829 



967 



879 



867 



•908 



15 



•965 



•835 



947 



817 



709 



746 



833 



878 [ 



856] 



840 



842 



[ -917] 



16 



•974 



•765 



826 



713 



710 [ 



843] 



716 



844 



822 



806 



860 



•925 



17 



•957 



•857 [ 



841] 



751 



716 



876 



814 



871 



955 



•780 [ 



863] 



•979 



18 



•821 



[ -822] 



883 



681 



715 



951 



798 [ 



831] 



816 



773 



843 



•951 



19 



•756 



•850 



840 



793 [ 



738] 



915 



773 



870 



854 



890 



916 



•960 



20 



•769 



•783 



793 



839 



664 



824 



733 



741 



833 [ 



863] 



848 



•993 



21 



[ -851] 



•843 



769 [ 



744] 



786 



860 [ 



781] 



783 



866 



910 



920 



•960 



22 



•875 



•863 



877 



795 



838 



764 



779 



920 [ 



847] 



914 



955 



[ -931] 



23 



•952 



•876 



859 



749 



832 [ 



852] 



725 



848 



891 



912 



876 



•822 



24 



•931 



•943 [ 



831] 



607 



763 



934 



881 



850 



796 



925 



914] 



•915 



25 



•892 



[ -882] 



878 



•767 



685 



877 



725 [ 



809] 



843 



925 



974 



•938 



26 



•814 



•900 



781 



•700 [ 



784] 



852 



831 



724 



842 



833 



929 



•925 



27 



•828 



•839 



823 



649 



784 



745 



804 



749 



870 [ 



894] 



832 



•985 



28 



[ -838] 



•874 



778 [ 



671] 



839 



769 [ 



822] 



762 



876 



941 



856 



•995 



29 



•832 



•850 



848 



676 



799 



796 



739 



793 [ 



827] 



899 



891 



[ -968] 



SO 



[ -797 





838 



604 



861 [ 



789] 



937 



783 



809 



843 



893 



•955 





868 



[ 



843] 





860 





895 



795 





821 





•968 



Mean 



0-935 



0-882 



828 



775 0- 



768 



819 



808 0- 



818 



852 



848 



882 



0-941 





