ROYAL IRISH ACADEMY. 
45 
Summary of Barometric Observations made in Charlotte Town , and the 
southern parts of the Gulf of St. Lawrence , between 1841 and 1850. 
Jan. 
Feb. 
March. 
April. 
May. 
June. 
July. 
Aug. 
Sept. 
Oct. 
Nov. 
Dec. 
1841 
29-964 
29-958 
30-115 
30-044 
29-837 
29-729 
29-816 
1842 
29-789 
29-838 
29-899 
29-895 
29-842 
29-986 
30-044 
30-172 
29-943 
29-899 
29-852 
29-853 
1843 
29-946 
29-725 
29-663 
29-927 
29-977 
29-900 
29-960 
30-120 
30-020 
29-843 
29-857 
29-920 
1844 
29-657 
29-928 
29-923 
30-070 
29*927 
29-970 
29-933 
30-036 
30-063 
29-985 
29-800 
29-777 
1845 
29-894 
29-856 
29-895 
29-900 
29-944 
29-790 
29-983 
29-695 
29-712 
1846 
29-568 
29-590 
29-716 
29-776 
29-736 
29-808 
29-750 
29-817 
29-803 
29-873 
29-704 
29-510 
1847 
29-610 
29-623 
29-520 
29-593 
29-790 
29-847 
29-903 
29-959 
20-883 
29-821 
29-764 
29-774 
1848 
29.820 
29-485 
29-682 
29-782 
29-704 
29-773 
29-909 
29-910 
29-802 
29-783 
29-765 
29-784 
1849 
29-617 
29-887 
29-813 
29-583 
29-817 
29-769 
29-872 
29-892 
22-975 
29-820 
29-690 
29-590 
1850 
29-730 
29-560 
29-470 
29-590 
29-720 
29-748 
29-797 
29-724 
29-791 
Means 
29-737 
29-722 
1 
29-725 
29-791 
29-829 
29-863 
29-903 
29-972 
29-901 
29-872 
29-762 
29-748 
Mean of all the Observations reduced to the Level of the Sea. 
Jan. 
Feb- 
March. 
April. 
May. . 
June. 
July. 
Aug. 
1 
Sept. Oct. 
Nov. 
Dec. 
29-781 
29-766 
29-769 
29-835 
29-873 
29-863 
29-903 
29-972 
1 
29-901 29-894 
29-806 
29-792 
From the observations carried on for three years, on board EL M. S. 
Investigator, in Melville Sound, and those of Captain Parry, at Melville 
Island, we find that the barometer was always lowest in July, August, 
and September; and comparatively high, although not highest, in 
January, February, and March. The low state of the barometer in the 
former months was marked in all Parry’s voyages; but from his observa¬ 
tions, as well as from those made in the Investigator, the greatest height 
was in April and May. 
It would seem that the annual course of atmospheric pressure, which 
prevails all over Asia (and which is the reverse of that observed in the 
Gulf of S. Lawrence), extends beyond the shores of Siberia, and is met 
in a modified form, on the American side of the Arctic Sea. 
The President read a letter addressed to him by the Baron de Bon- 
stettin, containing inquiries respecting ancient pipes discovered in ex¬ 
cavations in Ireland. 
The following antiquities were presented to the Museum :— 
