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cavations already made, thence turning at right angles to the 
north and continuing to meet the position planned for the 
sewer from the Horticultural Houses, a manhole being estab- 
lished at this intersection; thence to the Williamsbridge and 
Bronx Park sewer at the curve of the latter just before it 
passes under the railroad, as provided in the general plan. 
The divergence from the general plan, by taking advantage 
of the subway excavations along this line enabled us to 
escape all rock excavations. From the starting point of the 
12-inch sewer in front of the west wing of the Museum a 
to-inch line was laid parallel with the front wall of the 
Museum nearly to the east wing; and all the outlet pipes 
from the Museum were connected with this 10-inch line under 
the Parker contract. To obtain the necessary grades and 
allow for future connections it was necessary to lay these 
sewers very deep, and the work was not finished until July. 
n order to take care of the roof water of the Museum and 
the drainage from the Museum areas, a 10-inch vitrified pipe 
was laid in the bottom of the subway excavations from the 
west wing of the Museum to the main 18-inch land drain in 
the valley facing the railroad station; and also an 8-inch 
vitrified pipe from the eastern corner of the Museum to the 
ditch along the driveway leading to the lakes; this 8-inch 
line will ultimately be connected with the land drains of the 
driveway system which are planned to outflow into the lakes. 
In order to take care of the roof water of the range of 
Horticultural Houses a 15-inch vitrified pipe was laid from 
the manhole built under the Sheehan contract just north of 
house number 5 for 220 feet to the northwest, temporarily 
outflowing on the surface; this may also be connected with 
the land drain system in the future. 
The roof water of the Power House was made to flow into 
an 8-inch vitrified title connecting with a dry well 15 fect in 
diameter about 100 feet southwest of that building, and the 
blow-off water from the boilers as well as that which accu- 
mulates in the catch-pit of the Power House is discharged 
into this same dry well through a 3-inch vitrified pipe. The 
