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Mr. Hergesheimer joined the office on the 1st September, 1851, and has already proved a valuable addition to the department. Mr. Hebst has executed several pieces of work on contract, and in a highly creditable manner. Mr. Meyer, Mr. Neidlescioky, Mr. De Ahna, and Mr. Gritzner, have severally been employed for a few weeks in execution of various tracings and reductions upon contract. 3. ENGRAviNg.—This department was under the charge of assistant W. M. C. Fairfax till the .. of January, when, at his own request, he was transferred to the drawing department. From that time till October it was under my direction, J. C. Tennent, esq., assisting me in matters of detail, since which time it has been under the charge of Lieutenant E. B. Hunt, corps of engineers and assistant in coast survey. A.—The engraving of the following finished maps has been completed: 1. South side of Long Island, No. 1, by J. Knight, H. Knight, and O. A. Lawson; 2. Hart and City islands and Sachem's Head, by F. Dankworth, W. Smith, H. Knight, R. T. Knight, and J. V. N. Throop; 3. Hell Gate, by G. McCoy, F. Dankworth, and J. Knight; 4. Mobile entrance, (original and electrotype,) by R. T. Knight, J. Knight, F. Dankworth, and W. Smith; 5. Richmond's Island harbor, (being the preliminary sketch filled in with topography) by Wm. Smith, F. Dankworth, J. V. N. Throop, G. McCoy, and S. Siebert. B.—The engraving of the following sketches and preliminary charts has been completed: 1–3. Reconnaissance chart, (McArthur,) western coast, by S. Siebert, J. V. N. Throop, W. Smith, J. Knight, R. T. Knight, O. A. Lawson, E. F. Woodward, G. McCoy, A. Rolle, and F. Dankworth; 4. Richmond's Island harbor, by Wm. Smith and J. W. N. Throop; 5. Nantucket shoals, by J. V. N. Throop, O. A. Lawson, J. Knight, and R. T. Knight; 6–8. Second edition (McArthur) western coast, by G. McCoy; 9. Hatteras inlet, (resurvey,) by W. Smith, R. T. Knight, and J. V. N. Throop; 10–14. Five diagram maps of Cat island tides, by J. V. N. Throop, R. T. Knight, T. D. Donohoo, H. Knight, and T. H. Oehlschlager; 15. Recoenaissance of Mosquito inlet, by G. McCoy, W. Smith, and T. D. Donohoo, (per contract); 16. Reconnaissance of Horn Island pass, by H. Knight, R. T. Knight, and T. D. Donohoo; 17. Point Conception, by #K.W.S.V. N. Throop, and T. H. Oehlschlager; 18. Point Pinos and Bay of Monterey, by H. Knight, R. T. Knight, J. V. N. Throop, and H. C. Evens; 19. Mare Island straits, by W. Smith, J. V. N. Throop, G. McCoy, W. H. Dougal, H. Knight, R. T. Knight, and T. D. Donohoo; 20. Current chart of Boston harbor, by H. Knight and R. Knight; 21. Reconnaissance of Cedar keys, by J. V. N. Throop, R. T. Knight, and H. Knight; 22. Reconnaissance of the Delta of the Mississippi, by W. Smith, E. F. Woodward, G. McCoy, and J. V. N. Throop, (per contract;) 23. Reconnaissance of Pass Christian, by H. Knight, J. V. N. Throop, W. Smith, T. D. Donohoo, and H. C. Evens; 24. Galveston bay, by H. Knight, J. V. N. Throop, R. T. Knight, and T. D. Donohoo; 25. Aransas Pass, by J. V. N. Throop, R. T. Knight, and T. H. Oehlschlager; 26. Trinidad bay, by G. McCoy, W. H. Dougal, and J. V. N. Throop; 27. Entrance of Columbia river, by E. F. Woodward; 28. Cape Hancock, by G. McCoy and Wm. Smith; 29. Holmes' Hole, by J. Ackerman; 30–36. Seven maps of progress and geographical positions for annnal report. C.—The engraving of the following finished maps has been continued: 1. General coast chart, by F. Dankworth, O. A. Lawson, G. McCoy, and J. Knight; 2. No. 1, Long Island sound, by J. Knight, A. Rolle, O. A. Lawson, G. McCoy, and S. Siebert; 3. No. 1, Chesapeake bay, by O. A. Lawson and F. Dankworth; 4. Patapsco river, by O. A. Lawson and F. Dankworth; 5. No. 2, south side of Long Island, by O. A. Lawson and J. Knight; 6. No. 1, eastern series, by S. Siebert, J. V. N. Throop, and J. Knight; 7. Boston harbor, by A. Rolle, G. McCoy, H. M. Knight, and J. Knight; 8. Muskeget channel, by F. Dankworth, and E. F. Woodward. D.—The engraving of the following finished maps has been commenced: 9. Charleston harbor, by E. F. Woodward, F. Dankworth, S. T. Pettit, and G. McCoy; 10. Key West, by E. F. Woodward, W. Smith, F. Dankworth, and H. M. Knight; 11. Connecticut river, by S. Siebert, G. McCoy, W. Smith, W. H. Dougal, and T. D. Donohoo; 12, 13. Nos.1 and 2, Mobile bay, by F. Dankworth. E.—The engraving of the following sketches and preliminary charts has been commenced: 1. Seacoast of Delaware and Maryland, (plate enlarged by electrotyping additional engraving work of hydrographic arties,) by W. Smith and J. Knight; 2. Beaufort harbor, by S. Siebert, . V. N. Throop, H. M. Knight and R. T. Knight; 3. Humboldt bay, by W. Smith, T. D. Donohoo, and H. C. Evans; 4. Harbor of Key West, by A. Rolle, W. Smith, E. F. Woodward, R. T. Knight, H. M. Knight, and T. D. Donohoo; 5. Entrance of the Chesapeake, by S. stuff; 6. Re-engraving of Nantucket shoals, by J. H. Goldthwait; 7. Harbor of San Diego, by E. Yeager and T. D. Donohoo; 8. Entrance of San Francisco, by S. Siebert, E. F. Woodward, and J. V. N. Throop; 9. Savannah river, vicinity of Savannah, by J. V. N. Throop, H. M. Knight, T. H. Oehlschlager, T. Donohoo, and H. C. Evans; 10. Savannah entrance, by J. V. N. Throop and E. Yeager; 11. Mobile bay, by H. M. Knight, R. T. Knight, J. V. N. Throop, and H. C. Evans; 12. Bull's bay, (re-engraving,) by J. V. N. Throop, and T. Donohoo; 13. Entrance of Columbia river, by E. F. Woodward, W. Smith, J. V. N. Throop, and G. McCoy; 14–16. New edition of McArthur's chart of the western coast, by G. McCoy and W. Smith; 17. Point Pinos, (view,) by S. W. Hunt; 18. View of the mouth of the Columbia river, by G. McCoy; 19—26. Eight maps of progress and geographical positions. go ElectnotypING.-Mr. Mathiot has made, by the electrotyping process, during the past year, 16 engraved plates, all of which have been used by the printer. 1. Edgartown harbor; 2. New London; 3. New York (second electrotype copy;) 4, 5, 6. Sheets Nos. 1, 2, 3, McArthur's chart of the western coast; 7. Sheet No. 2, McArthur's chart of the western coast (second electrotype copy;) 8. No. 2, south side Long Island, (second electrotype copy;) 9. Mouth of the Columbia river; 10. Seacoast of Delaware and Maryland, (greatly enlarged;) 11, 12. Two copies of Hart and City islands, and Sachem's Head; 13. Sketch of Section IX; 14. Mobile entrance; 15, 16. Third and fourth electrotype copies of New York. . * ..
mets, (this helectroth plate
m the original plate copies ; from
Mr. Mathiot has likewise furnished the engraving department 57 blank plates for engraving; inspected all the copper-plates purchased during the year; made eighteen metre scales by the electrotyping process; applied forty-two days' work, of ten hours each, to repairing magnetic and electric apparatus for the party employed in determining longitudes by the magnetic telegraph, and in partly making metallic thermometers for deep-sea temperatures. These thermometers are about two-thirds done, and have been suspended for want of material to complete them.
Two weeks have been occupied in removing the electrotype apparatus to the building now occupied by it, and about twenty days in repairing derangements occasioned by the removal. Much time has also been occupied in renovations, changes, and the introduction of improved processes, as has been previously adverted to
PRINTING.–Since the 1st of November, 1850, there have been printed from Delaware bay and river (electrotype plate No. 1) 2,202 sheets, (this map consists of three sheets;) from the western part of the southern coast of Long Island, (electrotype No. 2,) 1,274 copies; froni the small map of the bay and harbor of New York, (electrotype No. 2,) 650; No. 3, 600; No. 4, 600 copies; from the large map of New York · bay and harbor, (original plates,) 300 sheets, (this map consists of six
sheets); from the harbors of Cat and Ship islands, (electrotype No. 1,) 520 copies; from the western coast reconnaissance, (original plates,) 1,842 sheets; (electrotype No. 1,) 4,728 sheets, (this map consists of three sheets); from Pasquotank river, (electrotype No. 1,) 333 copies; from Cawkins and Sheffield islands, (electrotype No. 1,) 290 copies; from Hyannis harbor, (electrotype No. 1,) 200 copies; from Hart and City islands and Sachem's Head harbor, (electrotype No. 2,) 1,207 copies; from preliminary sketch of Richmond's island, (original plate, 100 copies; from harbor of New London, (electrotype No. 2) 250 copies; from Oyster or Syosset bay, (electrotype No. 1,) 500 copies; from Huntingdon bay, (electrotype No. 1,) 500 copies; making in all 16,096 sheets.
Besides these, there have been printed 891 copies from the annual sketch plates; 382 from Davis' New South shoal; 250 from the seacoast of Delaware and Maryland; 426 from Hatteras shoals; 230 from Hitteras inlet; 30 from St. Andrew's shoals; 50 from Beaufort harbor; 375 from Cape Canaveral shoals; 600 tidal diagrams; 11,062 Cat island tides; 2,899 proofs of finished and unfinished plates and annual sketches; 325 circular protractors and scales of shades. There have also been 255 sheets antiquarian and 10 sheets double-elephant paper stretched in the printing office since the 1st of January, 1851.
PUBLISHING.–At the date of the last report 29 sheets of Coast Survey maps and 11 sketches had been published; these numbers have since been increased to 37 charts and 33 sketches.
Since November, 1850, there have been distributed, by direction of the Treasury Department, and for use in the survey, 1,104 sheets of Delaware bay and river, 554 copies of Hyannis barbur, 549 copies of Pasquotank river, 565 copies of harbors of Cat and Ship islands, and 1,704 sheets of the western coast. The whole number of sheets distributed is 4,476.
There have been turned over to the disbursing officer of the Coast
heets of the 348 copies copies of Heas of the hard d Sachem's last of Long Islamast, 221 copies of Cat and
Survey, to be placed with agents for sale, 150 sheets of the large map of New York bay and harbor; 1,224 sheets of Delaware bay and river; 651 copies of small map of New York bay and harbor, 110 copies of New Bedford, 309 copies of Nantucket harbor, 162 copies of the harbors of Cawkins and Sheffield islands, 195 copies of Hyannis harbor, 234 copies of Pasquotank river, 348 copies of the harbors of Cat and Ship islands, 3,200 sheets of the western coast, 221 copies of the westeru part of the southern coast of Long Island, 587 copies of Hart and City islands and Sachem's Head habor,--being in all, 7,391 sheets of maps.
INSTRUMENT MAKING AND REPAIRS. The alterations, repairs, dividing and cleaning, required by the instruments of the field and office parties, generally, have been made during the past year under the direction of Joseph Saxton, esq.
Besides, there have been made two trestles for base apparatus, two deep-sea buckets, a telegraph cylinder, a ruling machine, a plane-table, three tripod stands for telescopes, six iron plummets, thirteen metre chains; a ten-inch vertical circle has been altered into a theodolite, theodolites repaired, heliotropes repaired and adjusted, sextants and drawing instruments repaired.
ARCHIVES AND LIBRARY.—Mr. C. B. Snow, in charge of the archives and library, has re-registered the original and duplicate geodetic work, securing simple and convenient reference; separated the hydrographic and topographic reductions of original maps into their appropriate sections, and opened a new register, arranged chronologically, with an alphabetical index; superintended the binding of the original and duplicate sounding and angle books; nearly finished arranging the hydrographic and topographic sheets in single tubes; superintended the force employed in copying sounding and tidal observations required to correct errors and complete duplicates, which duty will soon be completed; examined the returns of the permanent tidal observers, and reported as to completeness; and placed the library in condition for convenient use.
MISCELLANEOUS.—The foregoingoffice-work has been generally under the immediate direction of the assistant in charge of the office. I proceed to notice other office duties conducted under my own immediate superintendence.
The examination of the hydrographic work returned by the different parties, the revision of sailing directions and lists of dangers, the comparison of charts prepared at different periods, the general direction of tidal computations according to prescribed form, and various miscellaneous hydrographic work, would occupy the time and attention of an accomplished hydrographer, with several assistants. During the past year, much aid has been derived from the labors, under my immediate direction, of Lieutenant Wm. B. Whiting, United States navy, who was detailed for coast survey service in March last; in examining portions of the work in various sections, and in revising other portions, and in reporting on subjects occurring during the progress of reduction of the charts. He has also computed the tidal observations at seven stations, and has directed the reductions made by Passed Midshipman
Somerville Nicholson, United States navy, sub-assistant A. S. Wadsworth, and Mr. C. T. Jardella. Professor Pendleton, United States navy, assistant in the coast survey, has, since his return from duty with the party of Lieutenant Commanding Woodhull, been engaged in the computations of moon culminations as observed in 1846 at Washington, Georgetown, Philadelphia, and Cambridge, with their corresponding ones in European observatories, for differences of longitude. He has also compared the results previously obtained for 1843, '44, '45, and '46, with the check computations of a second computer, and is employed in the observations of the same class made at San Diego, California. The discussion of the tides at Cat island, Louisiana, and of Fort Morgan, Alabama, has been in progress under my immediate direction by Mr. W. W. Gordon, assisted by Mr. P. B. Hooe. I am indebted, also, for aid in this and other discussions of observations, to Lieutenant W. P. Trowbridge, of the corps of engineers, attached to my party. The tidal observations at Key West, and at Galveston, are under examination under my special direction. Woods Baker, esq., has rendered useful aid in the office-work of the superintendent, both in the business work and scientific details. Brevet Captain G. W. Lay, United States army, who was detached for coast survey service in December last, has been on special duty under my immediate direction during the greater part of the time, particularly in connexion with the names of positions; and has rendered valuable aid in the preparation of my annual report. The disbursements under the charge of Samuel Hein, esq., and the business arrangements committed to him incidentally, have been made with an order and method, and care, which is characteristic of him. His experience in the details of the work, and his entire devotion to it, render his services of the highest value. In conclusion, I present to the department those employed in the various branches of the survey, in the office, in the field, and afloat, as having executed faithfully the duties intrusted to them, and deserving the approval of the executive and legislative authorities. Respectfully submitted by A. D. BACHE, Superintendent U. S. Coast Survey. Hon. Thomas CoRwin, Secretary of the Treasury.