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it on the berme bank of the Chesapeake and Ohio canal, adjacent to the line of the Washington aqueduct; and it will be measured in these bins.

4. Proposals will state the quantity which the bidder will undertake to deliver during this season, stating the rate of delivery per month, and the greatest and least quantity for which he will contract.

5. The proposals may be for any quantity not exceeding three hundred and fifty thousand bushels.

6. The engineer will designate the particular bin into which any load of sand is to be delivered.

l'roposal. The subscriber offers to contract for furnishing for the Washington aqueduct from one hundred thousand to one hundred and forty-four thousand bushels of sand, at the price hereinafter stated, and in the times and quantities of the following table, and to complete the delivery of the said sand in conformity to the terms of the preceding specifications, and upon the terms and conditions of the contract which he may hereafter subscribe, in the form a copy of which has been shown to and read by him:

For sand, per bushel, 6 cents.—12,000 bushels to be delivered by 1st June, 1857 ; 12,000 by July, 1857 ; 12,000 by August, 1857 ; 12,000 by September, 1857 ; 12,000 by October, 1857 ; 12,000 by November, 1857 ; 12,000 by December, 1857 ; 12,000 by January, 1858 ; 12,000 by March, 1858 ; 12,000 by April, 1858 ; 12,000 by May, 1858 ; 12,000 by June,

1858.

Signed by me, this 7th day of May, in the year of our Lord 1857.

RICHARD F. JACKSON. To Captain M. C. Meigs, U. S. Engineers:

We, the undersigned, residents of Montgomery county, in the State of Maryland, hereby, jointly and severally, covenant with the United States, and guaranty, in case the foregoing bid of six cents per bushel for the delivery of sand, &c., be accepted, that he or they will, within ten days after the acceptance of the said bid, execute a contract for the same, with good and sufficient sureties, to perform the work in conformity to the terms of the advertisement and specifications under which it was made. And in case the said Richard F. Jackson shall fail to enter into contract as aforesaid, we guarantee to make good the difference between the offer by the said Richard F. Jackson and the next lowest bidders.

ROBERT G. DAVIDSON.

PHILIP STONE. I hereby certify that, to the best of my knowledge and belief, the above-named guarantors are good and sufficient.

J. BREWER.

No. 11.

REPORT OF THE CHIEF TOPOGRAPHICAL ENGINEER.

BUREAU OF TOPOGRAPHICAL ENGINEERS,

Washington, November 23, 1857. SIR: I have the honor to submit a report of the operations of this bureau since the last annual report of November 22, 1856.

The stations and duties of the officers of the corps have been as follows:

Lieutenant Colonel Kearney, who has been stationed at Detroit in charge of the survey of the northern and northwestern lakes, was in the month of July last assigned to the duty of collecting required materials for a chart of Lake Ontario, a matter of great importance to the commerce of the lakes. His report is hereto appended, marked A.

Brevet Lieutenant Colonel Long, stationed at Louisville, in charge of western river improvements, was assigned in December last to the charge of the improvements mouth of the Mississippi river and Red river. His report is hereto appended, marked B.

Major Bache has been stationed at San Francisco, California, in charge of the construction of light-houses on the Pacific coast, and superintending the construction of military roads in Oregon and Washington Territories.

Brevet Lieutenant Colonel Graham, stationed at Chicago, is in charge of harbor improvements on Lake Michigan, and since December last in charge of harbor improvements on the northern and northwestern lakes. His report has not been received, which obliges me, for details on these works, to refer to the previous reports from Brevet Colonel Turnbull, from Brevet Lieutenant Colonel Graham, and from Captain Stansbury.

Brevet Colonel Turnbull remained at Oswego, superintending works on Lakes Champlain and Ontario, and part of Lake Erie, until December last, when he was assigned to works on the coast of North Carolina, and to construction of light-houses on the same coast. His report, marked D, is hereto annexed.

Captain Campbell Graham, assigned as assistant to Major Bache, in California, is yet sick, as reported in the last annual report.

Captain Cram has been stationed since May last at the headquarters, department of the east, under the command of General Wool, in the preparation of the reports of the operations in the department of the Pacific.

Captain Stansbury, on sick leave, at Cleveland, Ohio, under orders for department of Texas.

Captain Humphreys, stationed at Washington, on duties connected with Pacific railroad surveys, member of the Light-house Board, and preparing his report upon the survey of the delta of the Mississippi.

Captain Macoinb, stationed at Santa Fé, New Mexico, on duty at headquarters, department of New Mexico, and has the direction of the duties of construction of military roads in that Territory.

Captain Simpson, on duty of the Coast Survey, under the Treasury Department.

Captain Sitgreaves, assigned to duty under the Treasury Department, is in charge of the construction of light-houses on Chesapeake bay.

Captain Woodruff is on duty at Washington as assistant to the bureau of topographical engineers, and in charge of the survey of the Georgetown channel of the Potomac river. His report is not yet completed.

Captain Palmer, assigned to duty under orders of commanding general, department of Texas, has presented certificate of disability.

Captain Thom, stationed at St. Paul, Minnesota, is in charge of the construction of military roads in that Territory.

Captain Whipple, stationed at Detroit, Michigan, is in charge of the improvements of the St. Clair flats and flats of Lake George, St. Mary's river, and of construction of a light-house and of a beacon-light on St. Clair flats, and of light-houses on Lakes Ontario and Erie. His report is hereto appended, marked F.

Captain Meade, stationed at Detroit, Michigan, is in charge of the survey of the northern and northwestern lakes. His report, marked G, is hereto appended.

Captain M. L. Smith, stationed at Washington, is ou duty under the Treasury Department as assistant to Professor Bache, and in charge of the office of the Coast Survey.

Captain Pope is on duty in northern Texas, connected with the sinking of artesian wells.

Captain Abert, with the troops in Florida.

Captain Franklin, stationed at Washington, is on duty, under the direction of the Treasury Department, as engineer secretary of the Light-house Board.

Captain Raynolds, stationed at Philadelphia, is on duty of construction of light-houses on the Florida reefs and in Delaware bay, under the direction of the Light-house Board. He is also subject to the orders of this bureau.

First Lieutenant W. F. Smith, stationed at Detroit, is on duty of construction of light-houses on Lakes Superior, Michigan, and Huron, under the direction of the Light-house Board.

First Lieutenant Bryan is in charge of military roads in Kansas. His report, marked H, is hereto appended.

First Lieutenant Derby is on duty of construction of light-houses on the coast of the Gulf of Mexico, under the direction of the Lighthouise Board.

First Lieutenant Williamson is on sick leave.

First Lieutenant Michler is on duty connected with the survey of a ship canal in the Isthinus of Darien,

First Lieutenant Parke is on duty, under the orders of the State Department, as astronomer to the north west boundary.

First Lieutenant Warren, in charge of explorations and surveys in Nebraska Territory.

First Lieutenant Mendell is under the direction of Major Bache, in charge of construction of military roads in Oregon and Washington Territories. His report, marked I, is hereto appended.

First Lieutenant Ives is in charge of the exploration and survey of the Rio Colorado of the West.

First Lieutenant Abbott, stationed at Washington, is on duty connected with Pacific railroad survey.

Second Lieutenant Turnbull is on survey of the northern and northwestern lakes, under Captain Meade.

Second Lieutenant Wheeler is on duty at the headquarters of the military department of the Pacific.

Second Lieutenant Poe is on survey of northern and northwestern lakes, under Captain Meade.

Brevet Second Lieutenant Joseph L. K. Smith, assigned as a graduate cadet to the corps in July, is on leave of absence, granted by law to graduates of the Military Academy.

Brevet Second Lieutenant Putnam, assigned as a graduate cadet to the corps in July, has been recently on duty under Captain Crane by order of the colonel of topographical engineers.

Brevet Second Lieutenant W. P. Smith, assigned as a graduate cadet to the corps in July, is on leave of absence, granted by law to graduates of the Military Academy. His orders are to report to Captain Meade.

It is not considered necessary to repeat in this report the general remarks in previous annual reports, but special attention is called to recommendations therein for enlarged appropriations for explorations and surveys of the vast country between the Mississippi and the Pacific coast; for the survey of the lakes, and for military roads; for an increase of the corps; for the repairs and preservation of the steam dredges on the lakes, and to an appropriation for the payment of arrearages.

The appropriation in this last case would be for $25,000, and guarded with a proviso to settle claims by Third Auditor, approved by War Department.

The extreme delay which takes place in the printing of maps obliges me to bring the matter to your notice, and respectfully to suggest that maps furnished by a bureau of the War Department be printed under the direction of that bureau.

The reports of officers go much into detail in the several works in hand, exhibiting their progress and present condition, with estimates for continuation and completion; from which the following summary of operations is made out:

LAKE SURVEYS.

The office work during the winter and spring comprised the making of computations and projecting from the field notes, by the several parties, the detailed sheets of their work, of which eight sheets were to a scale of

10000; one sheet was to a scale of 10gou; one sheet was to a scale of doo; and one sheet was to a scale of 128000

In addition to the computation of the astronomical observations at the Charity islands, observations for the latitude and the longitude were made at Detroit.

The field observations of the present season have been conducted under the following organization of parties, namely: one primary triangulation and off-shore hydrography party; one astronomical and magnetic party; and three shore-line topography and hydrography parties.

One of the steamers has been in commission the entire season; the other steamer a portion of the season only.

The astronomical party has observed up to date of report twenty-one transits of moon, and moon-culminating stars, for the longitude, and two hundred and sixty-five pairs of stars with the zenith instrument, for the longitude of the observatory at Sand Point, Saginaw bay.

The shore-line topography and hydrography parties have been engayed upon the delineation of the shores of the main land and of the Sibonin islands, Saginaw bay, to the four-fathom curve.

These parties have already completed over two hundred square miles of topography and minute hydrography. Captain Meade adds : At the close of the present season of field work, it is expected that the base line will be measured; the main triangulation extended from it to cover all of the bay above the Charity islands; that the latitude and longitude of one of the points of triangulation will be accurately determined by observation, and the azimuths of one or more of the lines of triangulation ; that the topography and hydrography of the whole of the shore-line of the bay, both above and below the Charity islands, will be completed ; finally, the hydrography of the bay, above these islands, not included in the shore-line work, will be finished.

“In other words, the data obtained for the final projection of the chart of this extensive and important bay, above the islands, comprising a space of over pine hundred square miles of work executed.

One of the shore-line parties was detached from the organization in order to erect marks on the boundaries of the public lands at Mackinac island, the surveys at which had been made the previous season. This party was subsequently employed in revising a portion of the survey of Lake George, St. Mary's river.

During the past year five charts (one final and four preliminary) have been transmitted to the engraver, and considerable progress has been made in the preparation of additional charts.

An increase of the means in the department of drawing is seriously needed. Data for the charts of St. Mary's river, and three harbors on Lake Superior, are now in the office, and long before they can be prepared for engraving the data will be obtained for the chart of Saginaw bay.

The data is thus constantly accumulating, and a delay in the publication of the results of the survey necessarily occurs for want of adequate means to prepare them.

The list of charts published up to date comprises six final charts, and three preliminary charts; two final charts and one preliminary chart are now in the hands of the engraver; and four final charts are being prepared and nearly ready for engraving.

The importance of the lake surveys demands more liberal appro. priations than have hitherto been made, that its beneficial results may be more rapidly extended.

“The survey of the lakes has for its object the delineation of the

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