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The Triangular Surrey

The Triangular Surrey image
Parent Issue
Day
3
Month
August
Year
1877
Copyright
Public Domain
OCR Text

From the Monroe Commercial. Mr. George A, Mar, of the topographical onginoers, has beon in our city 8everal weeks, pursuing his labora ia oonnection with the triangular ' survey of the head of Lake Kriu, aud across the State to the hoad of Lake Michigan. This survey is quite singular and iutere8ting. It is made in this wise : Two stations are fixed upon as a base, and the exact distunco, to the huudredth part of an inch, is obtained ; then another station is found, the three foriuing a trianglo ; then a third, which with two of the tornier makes a triangle ; and so on, the distance from station to stiition being ascertained exuctly as the work progresses. Mr. Mar's base for this work was found on the shore of the lake below Sandusky, the third station of the f rut triangle being near Sandusky. A fourth station was made at Danbury, auother at Middle Bass Island, another at Locust Point, anotker at Middle Mister, another at Cedar Point, another at Stony Point, and Mr. Mar has located another on the county farm, and the next one will be at some point in the town of Bedtord. Eaoh station must be in sight of two other stations, as for instance, a persou at the station on the county farm must be able to see the stations at Cedar Point and Stony Point ; at the station in Bedtord, the Cedar Poiut and couuty farm stations must be in sight ; and wherever the next station may be fixed, (which will porhaps be somewhere iu the town of Summerfield), the county farm and Bedford stations must be in sight, and so on. Mr. Mar fixes upon the points for these stations by olimbing tall trees so as toget an unobstructed visiĆ³n over the surrounding county, and also superintends the erection of the stations whioh is done by coutraotors who follow after him in. The stations are from 15 to 100 feet high and upward. After the stations are ereoted, these other engineors follow, getting the exact distances from point to point, the indentations of the lake shore, etc, etc, and when the winter comes the mapping is pursued with the most accurate data to work upon. Mr. Mar oxpeots to oomptete his part of the work as far across the State as to BronBronson, this season.

Article

Subjects
Old News
Michigan Argus