[ 32 ] 78 
A point four miles above Armstrong's, on the Nest Lick, and four- 
fifths of a mile above this last place, level with Deep Creek. 
The measurement of the water was made after three or four weeks 
of dry weather, and computed according to methods established by 
the philosophical experiments of Du Berat, confiimed by those of Dr. 
Robinson, professor of natural philosophy in the University of Edin- 
burgh detailed and discussed in his work on mechanical philosophy. 
And tlie correctness of them was ingeniously tested by a method of 
mechanical measurement, contrived by Mr. Shriver, and the gentle- 
men of his brigade, to prove his calculations. It resulted, from the 
mean of all these operations, that Deep Creek at that period delivered, 
per second. 5^^^^^^ cubic feet; and Buffalo Run, coming in below the 
bridge, 1.703 = 7.247; and. corroborative of it, Captain McNeill 
measured the same in his section, and found 5.402 feet. 
All the head waters of the Youghiogheny were, at this period, also 
measured. 
The Little Youghiogheny was found to discharge 12.036 
The Main Youghiogheny 13.126 
Cherry Tree fork 4.300 
Snowy creek . = -.»,- 11.476 
Feet 41.038 
The developement of these facts, suggested the expediency of trying 
ti lower line for the summit level, and a survey was directed to be 
made up the valley of the Little Youghiogheny, to investigate the 
practicability of a communication with the Crabtree. This line of 
level was run tiventy-four feet below Deep creek, and was found to 
strike the ground seven and a half miles above Armstrong's, near the 
mouth of Block Run. and that a tunnel of nearly four miles would 
effect a communication with Crabby's arm. a branch of the Crabtree. 
The several lines ascertained by the surveys have their peculiar ad- 
vantages and disadvantages. It is necessary briefly to describe and 
enumerate them, in order to explain the reasons of preference, and to 
account for the manner of applying the principles upon ^yhich practi- 
cability depends. 
These lines may be all considered as starting westward from the 
mouth of Crabtree Creek, because, thus far, the successive levels must 
depend on the same source of supply. From that point down we 
have the waters of the Savage. 
Line. Distance. Summit, 
m. yds. m. yds. 
1st. By Savage River, Moni'oe Run, Meadow 
Mountain Valley, to Deep Creek bridge, 15.255 5.0833 
2d. By Crabtree, Middle Fork, west branch Mea- 
dow Mountain, 15.0035 3.1333 
3d, <' Nortb Glade, - - - - 15.0248 3.0125 
