1882. ] ENGINEER'S REPORT. 89 
The signal at Tuck’s Island is erected on solid rock. Itisa 
somewhat difficult place to erect a signal. The braces are sixteen 
feet long, the other dimensions being four by six inches. 
The survey was made in two sections. The part from Black 
Boy point to Sachem’s Head was made first. As we did not have 
an instrument suitable for connecting with the coast-survey trian- 
gulation, it was necessary to measure a base line, and also to obtain 
our own meridian line. The base line is 11,559.81 feet in length. 
It was carefully measured with a steel tape, which was held on the 
tops of short steel pins. A plumb line was used when necessary. 
About 9,000 feet of this line is on a salt marsh. The elevation of 
the end points is perhaps thirty and eighty feet. For the meridian 
line we made an observation on the north star. On the other sec- 
tion we were fortunate in finding two of the coast and geodetic 
survey points. This gave us’a direct connection. I respectfully 
call your attention to the sketch of the triangulation, which 
accompanies this report. In connection with this work we made 
surveys of the high-water line near the Highlands, and at Black 
Boy point, Hammonassett point, Kelsey point, and Cornfield point. 
We established four of the initial points of the meridian division 
lines between towns. One of these was directly triangulated. 
The other three have triangulation points near by, so that an angle 
and a direct steel tape measurement was all that was necessary to 
locate them. Of the six points of change in direction of the line 
limiting the ground under town control, two are at triangulation 
points, and four are close by like points. These surveys enable 
me to produce maps of the towns of Madison, Clinton, Westbrook, 
and Old Saybrook. 
At Tuck’s island, a copper bolt eight inches long and one inch 
in diameter is brimstoned flush with the rock and directly beneath 
the signal. At Duck island, a granite post, eight inches square 
and standing one foot above the surface, is set. The part of the 
post above ground is rough dressed, and the letters C. S. F. C. are 
cut on the top. These points have been used as initial points 
for the descriptions of a number of deeds. A hole drilled near 
the center of the large but symmetrical boulder-shaped rock in 
Killingworth harbor, and known as West Rock, furnishes another 
point from which descriptions of deeds are made. As we could not 
find suitable objects from which to hold our point at Kelsey point, 
in the town of Clinton, a small granite mere stone has been set. 
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