Ellsworth American. [volume] (Ellsworth, Me.) 1855-current, 1902-11-05
THE rEcu SUMMER SCHOOL.

Of Oct. 70 OF The Tech. paper issued by
the students Of the lnstI.ate of Techno-
logy, Boston. 1t win be remomb ered that
party OF students spent several weeks
here last summer, aud this article tells the
story Of their stay:
The civil engineering summer school
was held this year at Ellsworth, Me-,
under the direction OF Professor Burton,
who was assisted by Professors Barton
and Messrs. Robbins, Hosmer, SWEET,
Nelson and seahury.
| party lett Boston June Q, sailing on
tho steamer "Clty OF RockIsud" to Rock.
land, whore they changed to q small
steamer, which landed them at sarry
after q pleasant and eventual voyage
along the coast. surry Is about four miles
from Ellsworth, aud an old stage-cosc6
runs beiweea the two towns; this car
ried everybody except those who pre-
tsrred to walk.
Ellsworth Is situated on the Union
river, about four miles above its mouth,
and is very favorable for summer-sehool
i HRA"f WhANh h3NHtrtH hHtbA9 VI tbRc~
graphic surveying and measurements of
riverfiow and tides.
The FIRST part OF the survey was gem
arai rsconnoisance, made by the entire
party using aneroid barometers to get
Approximate elevations. base line for
the trisngniation was measured slong the
railroad, which Is on the east side OF
he kfrwr aA II
erected at prominent points on the
opposite side of the river. With these
trianguistiou points Fixed, the plane
table work was begun; this Included
making complete contour-map OF the
river valley Tor a distance OF about four
miles.
A tide-gauge was set up about two
miles below the town, and observations
inside to determine the height Of mean
tide, from which gauge levels we're run up
the valley aud bench marks established
10 give datum plane tot the survey.
re correct the survey made by the sum
mer school with the work OF the coast
su-vey, larger system OF trlangulatton
was carried on. One party was sent to
htFEHA ll&GAAAsfts 1851 DaGA Nt IsE mar
DOR on Me. Desert Island; this Is about
twenty miles southeast OF Ellsworth, aud
IL 8 coast s1rvey trisngalation point
A second party was sent to another
located trangaisgion point on Btaehi l..
shout fourteen miles southeast OF f lis.
worth. A third party was established on
bill above Ellsworth. and by means Of
angles between the ctasr two points.
Thus the three angles OF tie triHsgte-
were determined, and since one side wgs
known the Others could be calculated, and
thus tbs position Of thai station al Eli--
worth could be determined exactly.
Az this work was done Ia small parties
each evening the assignments for the
next day were posted aP, two or three
men would work at each plane table,
tour OF ave would be on the river max
ing current measurements, and Others
YOU'D be making road trsyerses and OBJ.
seryasions on the tlde-gauee. In this
way, every mau had chance 10 do each
d usrcnt part OF the work.
Tue road irsvsrses were made with q
NlEhs Dfanh iABAHs shA aiNtAuFHS were Qt+
tsrmincd by counting the revolutions OF
wagon ~ wheel, as IS done TIA the work OF
the geological survey. In this way all
the roads 10 the nelgh horhood were To-
Gated, aud they were afterwards traced
on the large plane table sheets, thus
making a complete map.
Tbs observations on tides were made
/ a.
Invented by Professor Robbins, and
showed in an interesting way the effect Of
the winds and river current on the rise
aud fall OF the tide. very important
part OF the work was the measurement. a
the current Ia the Union river. This Is a
swiftly flowing ,ream.with a rocky Bed
and steep banks.
A strsight portion OF the river was ST.
lected for this work, aud at carefully
measured Intervals lines were stretched
across he stream. A set OF soundinss
was made across the river on lines ten
feet apart up and down the stream, so
that the etoss-seetion of the water area
was determined. Then series OF obser-
yations with floats and current miters
WIS va W hNtEfA iAAiE Tue velocity
OF the current.
THIS work was carried on through all
the three weeks the party was at Els.
worth, and resulted In an accurate deter
mtnatiou Of the amount OF water flowing
down the river; the maps-and hydraulic
measurements made by the summer school
are now being used by company which
Is planning to develop he water power OF
the Union river.
The geological formations. about Ellis
worth are OF great Interest, and investi-
CAUTIOUS were carried on by Prof. Barton,
ana excursions made By the entire party,
to study the geology OF the regions. The
work at Ellsworth was. completed on
July 2, and some of the party made an ex-
cursion to Nova Scotia with Prof. Burton,
visiting the Joggins coal mines and fossil
beds, aud observing the tidal bore at
I