A Chart of the alluvial country is a desideratum, with which it is to be hoped the curious will in due time be obliged, under the present enlightened government: a correct sketch of the various reservoirs and canals which this great river has formed for the reception and disemboguement of its immense volume of waters, will become the basis of the vast improvements which at a future day will be made upon this inestimable portion of the United States.

NATCHEZ, January 1, 1804.

WILLIAM DUNBAR.

No. XXXI.

MONTHLY and annual Results of Meteorological Observations made by William Dunbar, Esq. at the Forest, 4 Miles East of the River Mississippi, in Latitude 31o. 28°. North, and Longitude 91°. 30s. West of Greenwich.

Author.

Communicated by the

YEAR, 1802. Deg. Deg. Deg. Deg. Inches. Inches. Inches. Inches. Inches.

Deg. Deg. Deg. Deg. Deg. Deg. Deg. Deg. Inches. Inches. Inches. Inches. Inches.

1803, June 30th, at 74 P. M. The sun being just set, a beautiful rain-bow was painted in the heavens forming a compleat semi-circle, excepting a small portion near the horizon which was imperfect; the external bow was very distinct: the inner bow, which was very vivid in the apper parts, struck the view with an unusual appearance, and, when inspected minutely, two other bows were distinctly seen, within the principal bow, concentric with it, and in contact with each other; (i. e.) where the purple of the first ended, the red of the second commenced, and so of the second and third; a dim ruddy appearance was seen within the third bow, which might have been taken for the rudiments of a fourth. The second bow was only about half the breadth of its principal, and the vividness of its colours was diminished in the same proportion. The third was of the same breadth with the second, but its brightness was reduced to half that of the other. These bows appeared to diminish in brightness, and to present appearances analogous to the images of a candle reflected from the double surfaces of a plate mirror. As the rain-bow is a reflector by which we can find the place of the sun, we must conclude from this phenomenon, that the horizontal refraction of the atmosphere had produced two images of the sun, above and in contact with the real sun, in the same order in which the bows were visible in the opposite side of the hemisphere.

1803, December 23d, at 54h. P. M. A very beautiful and very bright halo was seen around the moon; the prismatic colours were very distinct-red within, yellowish in the middle, and blue without.

On Monday, February 6th, 1804.

At Northumberland, (Pennsylvania), which had of late years been the place of his residence-died

The Rev. JOSEPH PRIESTLEY, L. L. D. F. R. S.

He was chosen a member of THE AMERICAN PHILOSOPHICAL SOCIETY, HELD AT PHILADELPHIA, &c." on the 22d January, 1785.

AT A STATED MEETING, Feb. 17, 1804.

It was resolved unanimously,

That a member of the Society be appointed to deliver an Eulogium on their late eminent Associate, Joseph Priestley, and that a special meeting of the Society be held on the 24th inst. at 6 P. M. for the purpose of electing the member who shall deliver it.

AT A SPECIAL MEETING, FEB. 24, 1804.

Benjamin Smith Barton, M. D. one of the Vice-Presidents of the Society, was chosen to deliver the Eulogium, as directed by the resolve of the 17th instant.

END OF PART FIRST.

OJ

Яtober 5th, 1804.

ded to convey ntains observa

the doctrines athematicians

necessary.

This subject has been treated by mathematicians of the first order in Italy, France and Germany, but more especially the former; and generally such partial views only have been taken of the subject, as have furnished them with the amusement of an elegant application of calculus. The theorems of Guglielmini have been held in the highest estimation, and, perhaps unfortunately for the progress of science, prevail too generally at this day. The theory of spouting fluids issuing from

A