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Difference of

Longitude by Fulton each signal.

correct Fulton west of sidereal time the meridian of of

Chicago Fulton

observing signals. station No. 3.

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POSITIONS IN THE CITY OF

YULTON, ILLINOIS.

| Longitude West of Greenwich. North Latitude.

In arc. In Time.

1. Intersection of the middle of Cherry Street, with the middle

h. m. 8. of Base Street, - - - -

41 52 63 90 16 65

6 00 40.2 2. Dome of the Dement Hotel, - 41 52 04 90 10 02.35 6 00 40.16 3. Steeple of the Congregational

Church, - - - - - - - - 41 51 59.2 90 09 50.3 6 00 39.35 4. The centre of Washington Square, 41 52 01.8 90 09 38.4 | 6 00 38.56 5. Foot of Cherry Street, on the

east bank of Mississippi river, at high water mark, -.| 41 52 03 9 0 10 15.2 | 6 00 41.01

On Nicollet's map, Fulton is placed in latitude 41° 52' 43'' N., and longitude 90° 13' 45" West of Greenwich, which, in comparison with our result, if we take the centre of Washington Square as the point of reference, is + 41".2 in latitude, and + 4'06".6 in longitude.

In the last edition (that of 1857) of the map of the territory of the United States, from the Mississippi to the Pacific Ocean, Fulton is laid down in latitude 41° 55'27" N., and in longitude 90° 12' 19" W., which, in comparison with our result, is + 3' 25" in latitude, and + 2' 41" in longitude.

XIV. LYONS, IOWA. Station.--Near the middle of the garden of Mr. Benjamin Lake's bouse, on Third Street, at the S. W. corner of Third and Exchange Streets. From the station to the point of intersection of the axes or middles of these two streets, is N. 45° 49' 30" E., and the distance is 190 feet.

1st. Observations for the Latitude. Time-stars B Tauri west, and a Bootis (Arcturus) east. Sidereal chronometer fast 1h. 00m. 31.2s. at 9h. 57m. sidereal. Mean solar chronometer fast 5m. 11.4s. at 9h. 36m. mean time.

Latitude of Station. 1858, March 27th.
By 22 circum-meridian altitudes of a Hydræ south,

and 20 circum-meridian altitudes of a Virginis,
also south, combined with 25 circum-meridian
altitudes (at lower meridian transit) of Polaris,
north,

. . . 41° 52' 11".78 Correction due to the observations for lat. at Fulton, and the survey connecting the two stations,

+ 1.92

Latitude of station adopted,

41° 52' 13'.7 N.

2d. The Longitude. This we derive from the survey made to connect the Fulton and Lyons stations, thus :Longitude of the Fulton Station, as o

h. m. S. already given,

. 90 09 59.85 = 6 00 39.99 Lyons Station west in longitude, . + 44.29 = + 2.95

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XV. ALBANY, ILLINOIS. This place is sometimes called “New Albany.” It is situated on the eastern shore of the Mississippi river.

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 Hydræ, south,

combined with 5 altitudes of Polaris, north (clouds
prevented more observations on Polaris) . 41° 47' 23"
2d. 1858, March 26th.
By 23 circum-meridian altitudes, at lower meridian

transit, of Polaris, north, combined with 21 circum-
meridian altitudes of a Virginis, south, -

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Latitude of station,-giving the result of the 26th,

three times the weight of that of the 25th, Reduction to the point of intersection of the axes of

Maple and Main Streets,

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Result-Latitude of the point of intersection of the

axes of Maple and Main Streets, Albany, Ills.

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2d. Observations for the Time. 1st. 1858, March 25th. Sidereal chronometer No. 2557, fast: By 6 observations on y Geminorum, west (at 9h. h. m. S. 48m.)

+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.)

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By comparison—Mean Solar chronometer No. 141,

was fast of mean solar time for this station (at
10h. 00m. mean time)

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2d. 1858, March 26th. Sidereal chronometer No. 2557, fast : By 10 observations on a Leonis (Regulus), west (at

13h. 50m.) . . . By 10 observations on a Lyræ, east h. m. S. (at 14h. 10m.)

- 1 00 38.78 By 10 observations on a Aquilæ, also

east (at 16h. 14m.) . - 1 00 38.14

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Result-Chronometer No. 2557, fast of sidereal time h. m. 8. for this station (at 14h. 31m. sidereal)

+1 00 38.81

By comparison—Chronometer No. 141, was fast of

mean solar time for this station (at 14h. 12m. mean time) · ·

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Longitude deduced of the Albany observing station, + 6 00 54.22
Reduction to the intersection of Maple and Main
Streets,

- 0.06

ResultLongitude of the intersection of Maple and

Main streets, Albany, Ills., west of the meridian of Greenwich,

- 6 00 54.16 Equal, in arc, to

90° 13' 32".4 W. Latitude of the same point, as before,

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

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