Part 47

On the 2d of November the weather became clear, and the necessary astronomical observations were immediately commenced at Parks Hill. From this elevated point the first station could be distinctly seen by means of small heliotropes during the day and bright lights erected upon it at night. Its direction, with that of several intermediate stations due south of Parks Hill, was verified by a new series of transit observations upon high and low stars, both north and south of the zenith. By the same means the line was prolonged to the north.

In one week after commencing the observations at Parks Hill the weather became again unfavorable. The sky was so constantly overcast as to preclude all astronomical observations, and the atmosphere so thick as to prevent a view to the north which would permit new stations to be established with sufficient accuracy in that direction. Unwilling to quit the field while there was a prospect of the weather becoming sufficiently favorable to enable the party to reach the latitude of Mars Hill, or even proceed beyond it, it was determined that some of the party should continue in the tents, and there occupy themselves with such calculations as ought to be made before quitting the field. The officers charged with the line of levels and with the reconnoissances in advance for the selection of new positions for stations continued their labors in the field, notwithstanding they were frequently exposed to slight rain and snow storms, as these portions of the work could go on without a clear sky.

On the 13th of November a severe snowstorm occurred, which in a single night and a portion of the following morning covered the surface of the whole country and the roofs of the tents to a depth of 16 inches. The northern extremity of the avenue which had been cleared by the surveyors of 1817 was now reached, and, in addition to the young growth which had sprung up since that period upon the previous part of the line, several miles had been cleared through the dense forest of heavy timber in order to proceed with the line of levels, which had reached nearly to the Meduxnakeag. The depth of snow now upon the ground rendered it impracticable to continue the leveling with the requisite accuracy any further, and that part of the work was accordingly suspended for the season. The thermometer had long since assumed a range extending during the night and frequently during a great portion of the day to many degrees below the freezing point.

The highlands bordering on the Aroostook, distant 40 miles to the north of the party, were distinctly seen from an elevated position whenever the atmosphere was clear, and a long extent of intermediate country of inferior elevation to the position then occupied presented itself to the view, with the two peaks of Mars Hill rising abruptly above the general surface which surrounded their base. The eastern extremity of the base of the easternmost peak was nearly 2 degrees of arc, or nine-tenths of a mile in space, to the west of the line as it passed the same latitude.

To erect stations opposite to the base of Mars Hill and upon the heights of the Aroostook, in order to obtain exact comparisons with the old line at these points, were considered objects of so much importance as to determine the commissioner to continue the operations in the field to the latest practicable period in hopes of accomplishing these ends.

On the 18th day of November the party succeeded in erecting a station opposite Mars Hill and very near the meridian line. It was thus proved that the line would pass from nine-tenths of a mile to 1 mile east of the eastern extremity of the base of the northeast peak of Mars Hill.

On the 30th of November a series of signals was commenced to be interchanged at night between the position of the transit instrument on Parks Hill and the highlands of the Aroostook. These were continued at intervals whenever the weather was sufficiently clear until by successive approximations a station was on the 9th of December established on the heights 1 mile south of that river and on the meridian line. The point thus reached is more than 50 miles from the monument at the source of the St. Croix, as ascertained from the land surveys made under the authority of the States of Maine and Massachusetts. The measurements of the party could not be extended to this last point, owing to the depth of the snow which lay upon the ground since the middle of November, but the distance derived from the land surveys must be a very near approximation to the truth. A permanent station was erected at the position established on the Aroostook heights and a measurement made from it due west to the experimental or exploring line of 1817, by which the party found itself 2,400 feet to the east of that line.

Between the 1st and 15th of December the observations were carried on almost exclusively during the night, and frequently with the thermometer ranging from 0 to 10 and 12 degrees below that point by Fahrenheit's scale. Although frequently exposed to this temperature in the performance of their duties in the open air at night, and to within a few degrees of that temperature during the hours of sleep, with no other protection than the tents and camp beds commonly used in the Army, the whole party, both officers and men, enjoyed excellent health.

During the day the tents in which the astronomical computations were carried on were rendered quite comfortable by means of small stoves, but at night the fire would become extinguished and the temperature reduced to within a few degrees of that of the outward air. Within the observatory tent the comfort of a fire could not be indulged in, in consequence of the too great liability to produce serious errors of observation by the smoke passing the field of the telescope. The astronomical observations were therefore always made in the open air or in a tent open to the heavens at top during the hours of observation, and without a fire.

On the 16th of December the tents were struck and this party retired from the field for the season, there being then more than 2 feet of snow on the ground. To the unremitting zeal amidst severe exposures, and to the scientific and practical attainments of the officers, both civil and military, who served under the orders of the commissioner on this duty, he acknowledges himself in a great measure indebted for the progress that he was enabled to make, notwithstanding the many difficulties encountered.

Observations were made during portions of three lunations of the transit of the moon's bright limb and of such tabulated stars as differed but little in right ascension and declination from the moon, in order to obtain additional data to those furnished by chronometrical comparisons with the meridian of Boston for computing the longitude of this meridian line.

At the first station, 4,578 feet north of the monument, and also at the Parks Hill station, the dip of the magnetic needle was ascertained by a series of observations--in the one case upon two and in the other upon three separate needles. The horizontal declination was also ascertained at both these stations by a full set of observations upon six different needles.

The details of these and of all the astronomical observations alluded to will be prepared as soon as practicable for the use of the commission, should they be required. To His Excellency Major-General Sir John Harvey, K.C.B., lieutenant-governor of the Province of New Brunswick, Major Graham acknowledges himself greatly indebted for having in the most obliging manner extended to him-every facility within his power for prosecuting the examinations. From Mr. Connell, of Woodstock, a member of the colonial parliament, and from Lieutenant-Colonel Maclauchlan, the British land agent, very kind attentions were received.

Major Graham has also great pleasure in acknowledging his obligations to General Eustis, commandant of the Eastern Department; to Colonel Pierce, commanding the garrison at Houlton, and to his officers; and also to Major Ripley, of the Ordnance Department, commanding the arsenal at Augusta, for the prompt and obliging manner in which they supplied many articles useful to the prosecution of the labors of his party.

The transit instrument with which the meridian line was traced had been loaned to the commission by the Hon. William A. Duer, president of Columbia College, New York, and the commissioners feel bound to return their acknowledgments for the liberality with which the use of this astronomical instrument was granted at a time when it would have been difficult, and perhaps impossible, to have procured one as well suited to the object.

All which is respectfully submitted.

JAS. RENWICK,

JAMES D. GRAHAM,

A. TALCOTT,

_Commissioners_.

[Footnote 90: Also see report No. 176, House of Representatives, Twenty-fifth Congress, third session.]

WASHINGTON, _February 12, 1841_.

_To the Senate of the United States_:

I transmit a report of the Secretary of State, containing the information asked for by the resolution of the Senate of the 5th instant, relative to the negroes taken on board the schooner _Amistad_.

M. VAN BUREN.

WASHINGTON, _March 2, 1841_.

_To the House of Representatives_:

I transmit to the House of Representatives a report from the Attorney-General, with accompanying documents,[91] in compliance with the request contained in their resolution of the 23d of March last.

M. VAN BUREN.

[Footnote 91: Opinions of the Attorneys-General of the United States from the commencement of the Government to March 1, 1841.]

WASHINGTON, _March 2, 1841_.

_To the House of Representatives_:

I transmit the accompanying report from the Secretary of State, in relation to the resolution of the House of Representatives of the 12th ultimo, on the subject of claims of citizens of the United States on the Government of Hayti. The information called for thereby is in the course of preparation and will be without doubt communicated at the commencement of the next session of Congress.

M. VAN BUREN.

WASHINGTON, _March 3, 1841_.

_To the House of Representatives_:

I transmit to the House of Representatives, in compliance with their resolution of the 30th January last, a report[92] from the Secretary of State, with accompanying documents.

M. VAN BUREN.

[Footnote 92: Relating to the search or seizure of United States vessels on the coast of Africa or elsewhere by British cruisers or authorities, and to the African slave trade, etc.]

PROCLAMATION.

[From Senate Journal, Twenty-sixth Congress, second session, p. 247.]

WASHINGTON, _January 6, 1841_.

_The President of the United States to------, Senator for the State of------_.

Certain matters touching the public good requiring that the Senate of the United States should be convened on Thursday, the 4th day of March next, you are desired to attend at the Senate Chamber, in the city of Washington, on that day, then and there to receive and deliberate on such communications as shall be made to you.

M. VAN BUREN.