2d. The Longitude. This we derive from the survey made to connect the Fulton and Longitude, deduced, of Lyons Station, 90 10 44.14 = 6 00 42.94 Our survey, based on this result, gives two other positions in Lyons, as follows, viz.— On Nicollet's map, this position is given + 30" in latitude, and +5' 50" in longitude greater than our observations give for our station, which is nearly central of the city. On the other map mentioned, it is + 2' 02" in latitude, and + 3' 57" in longitude greater than ours. XV. ALBANY, ILLINOIS. This place is sometimes called "New Albany." the eastern shore of the Mississippi river. It is situated on Both chronometers were carried from Fulton to Albany and back to Fulton, between the 25th and 28th of March, 1858. Observations were made at Albany on the nights of the 25th and 26th, both for the latitude and the time. The longitude of this place is derived from chronometric comparison with the meridian of Fulton. Station. From this station to the intersection of the axes of Maple and Main Streets, is S. 48° 51′ 03′′ E. (true), and the distance is 89 feet. 1st. Observations for the Latitude. 1. 1858, March 25th. By 18 circum-meridian altitudes of a Hydra, south, combined with 5 altitudes of Polaris, north (clouds 41° 47' 23" 2d. 1858, March 26th. By 23 circum-meridian altitudes, at lower meridian transit, of Polaris, north, combined with 21 circummeridian altitudes of a Virginis, south, Latitude of station,-giving the result of the 26th, Result-Latitude of the point of intersection of the axes of Maple and Main Streets, Albany, Ills. " 41 47 20.2 41 47 20.9 N. 0.6 41 47 20.3 N. 2d. Observations for the Time. 1st. 1858, March 25th. Sidereal chronometer No. 2557, fast: By 6 observations on y Geminorum, west (at 9h. 48m.) h. m. S. +1 00 33.35 By 12 observations on a Bootis, east (at 10h. 42m.) + 1 00 34.87 Result-Chronometer No. 2557, fast of sidereal time for this station (at 10h. 15m.) By comparison-Mean Solar chronometer No. 141, was fast of mean solar time for this station (at 10h. 00m. mean time) +1 00 34.1 + 5 23.98 2d. 1858, March 26th. Sidereal chronometer No. 2557, fast: By 10 observations on a Leonis (Regulus), west (at Result-Chronometer No. 2557, fast of sidereal time for this station (at 14h. 31m. sidereal) By comparison-Chronometer No. 141, was fast of mean solar time for this station (at 14h. 12m. mean time) Rates of Chronometers from the 24th to the 28th of March, 1858. sidereal day, Sidereal chronometer No. 2557, gains per day, 3d. The Longitude. +48.14 S. + 14.49 +14.15 Albany Station, west of the meridian of Fulton Station, by the Albany time-observations of March 25th: By the run of sidereal chronometer No. 2557, By the run of mean solar chronometer No. 141, By the Albany time-observations of March 26th: By the run of sidereal chronometer No. 2557, By the run of mean solar chronometer No. 141, Mean of these four results, Longitude of Fulton observing station, + 14.32 + 13.97 + 14.23 h. m. 8. +6 00 39.99 Longitude deduced of the Albany observing station, +6 00 54.22 Reduction to the intersection of Maple and Main Streets, Result-Longitude of the intersection of Maple and of Greenwich, Equal, in arc, to Latitude of the same point, as before, 0.06 6 00 54.16 90° 13' 32".4 W. 41° 47' 20''.3 N. On Nicollet's map, this position is placed in latitude 41° 45′ 37′′ N. and in longitude 90° 21' 52" W., which differs from our result by - 1' 43" in latitude, and + 8' 30" in longitude. This place is not laid down on the other map. A town is now being laid out on the site of an extensive group of Indian mounds, on the eastern shore of the Mississippi, which is to be called South Albany. It is in Illinois, and is situated a little more than a mile below Albany. By our survey, and an observed azimuth of the star Polaris, connected with the above astronomical station, we make the tallest Indian mound, which will be preserved, according to the plan, in the public park of South Albany, in— Latitude, Longitude, west of Greenwich, 41° 46' 35" N. 6h. 00m. 56.93s. 90° 14' 14" W. NOTE.-The west end of the ferry which crosses the stream draining the Marais des Osiers (corrupted into "Meredosia Marshes" on some of the maps, and into " Marais d'Ogee" on others) near the left bank of the Mississippi, on the stage road between Albany and the City of Rock Island, was found, by an offset in our survey between Albany and Camanche, to be in Latitude, Longitude, 41° 46' 11".6 N. 6h. 00m. 59.9s. 90° 14' 58".5 W. XVI. CAMANCHE, IOWA. This town is situated on the western shore of the Mississippi. By triangulation from our observing station at Albany, and an ob served azimuth of Polaris to obtain the true meridian, we derive the position of Camanche, as follows, viz. the longitude 10' 20" greater than the above. He probably had no observing station near this point, but depended on other authorities for its position. XVII. CITY OF ROCK ISLAND, ILLINOIS. This city is on the left or south bank of the Mississippi river,* which, for a short distance above and opposite this place, flows from east to west in its course. The western terminus of the Chicago and Rock Island Rail Road, is here. The rail-way connects, however, by a bridge across the river, with the City of Davenport, in Iowa, situated on the opposite bank of the river; and, under the name of the Mississippi and Missouri Rail Road, runs in a direction about W. N. W. to Iowa City, distant 54 miles from Davenport. Station. The centre of Washington Square (called, on some of the maps, Church Square) bounded on the north by Illinois street, on the south by Orleans street, on the east by Madison, and on the west by Jefferson street. α 1st. The Latitude. 1859, February 28th. By 17 circum-meridian altitudes of a Hydræ, south, combined with 20 altitudes of Polaris, north: latitude of station, 41° 30' 37".8 2d. Observations for the Time. 1859, February 28th. Sidereal chronometer No. 2557, fast: * A plan for a city, called "Rock Island City," is laid out on Rock river, about 3 miles south of the "City of Rock Island." The two places should not be confounded under names so nearly alike. |