HEIGHT IN THE ATMOSPHERE, AT DIFFERENT SEASONS IN THE YEAR. 



Table I. — continued. 



491 





8 A. M. 



8 p. M. 1 



Date. 

























Bonally. 



Colinton. 



Bonally 

 corrected. 



Colinton 

 corrected. 



Diff. 



Bonally. 



Colinton. 



Bonally 

 corrected. 



Colinton 

 corrected. 



Diff. 



Mar. 1831 



37.61 



42.42 



37.26 



42.24 



4.98 



38.45 



43.00 



38.10 



42.82 



4.72 



..; 1832 



36.68 



42.48 



36.33 



42.28 



5.95 



37.68 



40.64 



37.33 



40.37 



3.04 



... 1833 



34.87 



38.48 



34.52 



38.15 



3.63 



35.39 



37.48 



35.04 



37.13 



2.09 



... 1834 



39.16 



42.61 



38.81 



42.40 



3.59 



37.93 



41.84 



37.58 



41.60 



4.02 



... 1835 



36.26 



38.85 



35.91 



38.02 



2.11 



36.48 



38.42 



36.13 



38.10 



1.97 



182.83 



203.09 



20.26 



184.18 



200.02 



15.84 



Apr. 1831 





Mean 



36.56 



40.61 



4.05 





Mean 



36.83 



40.00 



3.17 



41.30 



45.47 



40.95 



45.88 



4.43 



42.34 



46.10 



41.99 



46.00 



3.01 



... 1832 



42.13 



46.63 



41.78 



46.56 



4.78 



41.13 



44.63 



40.78 



44.50 



3.72 



... 1833 



41.37 



44.67 



41.02 



44.55 



3.63 



39.90 



43.83 



39.55 



43.68 



4.13 



... 1884 



41.37 



46.53 



41.02 



46.46 



6.44 



40.43 



46.23 



40.08 



46.16 



6.07 



... 1835 



40.97 



45.60 



40.62 



45.51 



4.89 



40.00 



46.80 



39.65 



46.72 



6.07 



206.39 



228.46 



23.07 



202.05 



226.05 



23.00 



May 1831 





Mean 



41.08 



46.69 



4.61 





Mean 



40.41 



45.01 



4.60 



46.48 



50.39 



46.13 



50.40 



4.27 



46.58 



49.93 



46.23 



49.93 



3.70 



... 1832 



45.48 



50.93 



46.13 



60.96 



5.82 



46.19 



49.32 



44.84 



49.31 



4.47 



... 1833 



52.06 



66.97 



51.71 



57.20 



5.49 



61.74 



65.19 



61.39 



65.40 



4.01 



... 1834 



49.41 



53.97 



49.06 



64.10 



5.04 



49.90 



63.80 



49.55 



63.95 



4.40 



... 1835 



45.61 



50.10 



45.26 



60.10 



4.84 



45.39 



49.87 



45.04 



49.87 



4.83 



237.29 



262.75 



26.46 



237.05 



258.46 



21.41 



June 1831 





Mean 



47.46 



52.55 



6.09 





Mean 



47.41 



51.69 



4.28 



56.23 



68.97 



64.88 



59.24 



4.36 



55.77 



58.27 



55.42 



58.52 



3.10 



... 1832 



53.97 



57.83 



63.62 



68.09 



4.47 



53.07 



57.00 



52.72 



57.24 



4.52 



... 1833 



53.50 



67.37 



63.16 



57.62 



4.47 



52.30 



55.90 



51.95 



66.12 



4.17 



... 1884 



54.43 



57.57 



54.08 



67.81 



3.73 



54.97 



56.97 



54.62 



67.20 



2.68 



... 1835 



53.37 



65.43 



53.02 



55.64 



2.62 



61.90 



65.27 



51.55 



65.48 



3.93 



268.76 



288.40 



19.65 



266.26 



284.56 



18.30 



July 1831 





Mean 



53.75 



57.68 



3.93 





Mean 



53.25 



66.91 



3.66 



57.68 



60.06 



57.33 



60.36 



3.03 



68.27 



60.77 



67.92 



61.07 



3.15 



... 1882 



•55.16 



59.03 



54.81 



59.30 



4.49 



55..52 



57.84 



65.17 



68.09 



2.92 



... 18.33 



57.03 



59.61 



56.68 



69.90 



3.22 



56.68 



58.55 



56.33 



58.82 



3.49 



... 18.34 



56.16 



.59.19 



55.81 



69.47 



3.66 



67.00 



59.26 



66.65 



69.54 



2.89 



... 1836 



55.77 



57.64 



55.42 



67.90 



2.48 



64.81 



57.07 



54.46 



57.31 



2.85 



280.05 



. 296.93 



16.88 



279.53 



294.83 



15.80 



Aug. 1831 





Mean 



56.01 



59.38 



3.37 





Mean 



55.90 



68.96 



3.06 



57.06 



59.71 



56.71 



60.00 



3.29 



55.90 



59.55 



55.55 



59.84 



4.29 



... 1832 



55.23 



57.52 



54.88 



57.77 



2.89 



68.68 



66.48 



53.83 



55.70 



2.37 



... 1833 



52.06 



55.55 



51.71 



55.76 



4.05 



50.45 



54.97 



50.10 



55.16 



5.06 



... 1884 



56.84 



59.87 



55.49 



60.17 



4.68 



54.48 



69.19 



64.13 



69.47 



5.34 



... 1835 



57.58 



68.84 



57.23 



69.12 



1.89 



56.00 



58.97 



55.65 



59.25 



3.60 



276.02 



292.82 



16.80 



268.76 



289.42 



20.66 



Sept. 1831 





Mean 



55.20 



58.56 



3.36 





Mean 



63.75 



57.88 



4.13 



50.87 



54.27 



60.52 



54.44 



3.92 



50.97 



64.14 



50.62 



54.30 



3.68 



... 18.32 



51.77 



53.87 



61.42 



64.02 



2.60 



50.63 



53.40 



50.28 



53.54 



3.26 



... 1833 



49.13 



52.83 



48,78 



52.96 



4.17 



48.57 



52.47 



48.22 



52.57 



4.35 



... 1834 



50.83 



52.70 



50.48 



62.80 



2.32 



60.07 



62.87 



49.72 



52.98 



3.26 



... 1836 



50.03 



50.80 



49.68 



50.83 



1.15 



49.17 



61.27 



48.82 



51.32 



2.60 



250.88 



265.04 



14.16 



247.66 



264.71 



17.05 







Mean 



50.18 



63.01 



2.83 



1 



Mean 



49.63 



62.94 



3.41 



