1877.] 23 (Carll 
Emporium Junction 19 feet, and the B. N. Y. & Philadelphia levels 1/ as far 
as Olean. It crossesthe N. Y. & Erie Railway at Olean two feet below the 
Erie levels, which were run from tide at Jersey City and would reach the 
Lake one foot too high if carried down by the B. N. Y. & Philadelphia lev- 
els, which gives 862/ fall. But we find that the N. Y. & Erie levels give 
864’ fall so that a mean between the two, 863/ subtracted from 1436/ = 
073/ the precise elevation as accepted for Lake Erie. The B.N. Y. & Phil- 
adelphia levels are said to have been run from the water of Buffalo Creek 
some distance from the lake and may therefore be presumed to be based on 
a higher point than lake level. 
Variations of from one to three feet will be found between different lines at 
nearly every point we are attempting to compare. As we are only rising 
even feet in making this adjustment, a disagreement of one foot may some- 
times occur in this way between two roads where there would really be 
but a very slight difference if the decimals were accurately taken into ac- 
count. 
Be 
Pittsburgh to Lake Erie by the Allegheny Valley, Oil Creek, and Alle- 
gheny River, Union and Titusville and Philadelphia and Erie Railways. 
| Above 
| | ocean. 
Pittsburgh | Accepted elevation . =| 745 
OivOity Ue Depot. « .. s.% | 263 Above Pittsburgh by AS ‘Valley pro-| 
ALO CD) iS eeetTA re se telet ee ierene eae 1008 
ds Sehr erne, (na sct tales | 995 Above ocean by O. C. & A. R. profile 
| ( Wotan cers Bho ole Me aucwe noice ceces 
e CS Ae ea ame, - | 1007 Above ocean by A. & G. W. profile (X)| 
Ms OE VE pat eetis | 1011 | ST 5 Geese of CXLD)! 
Re Ce OS Eee oie 18 Too Jow on a C.& A. R. BEG F 
oe st 6 on Gita Oae 1 ore At SiGe Wi. 
ca LO or rece 3 |ToohighonL.S.&M.S. “ 
PiUSVUle ce eae. Slelsl sie ts se 186 “Above ¢ Oil City by 0. C.& A. R. Seattle 
| CNEID ch Peas Beak | 1194 
re Be eeine eee levees, PLS He ocean by O. C.& A_R. profile 
Veacay liter ee Mo cd oe etied ok aol a abbolaer Ae 
De Viaeneepe ees «WLS Above ocean by: Ve & T. Brg alent) 
ee Sh ehigatioms Gel siicy cease 13 |Too low on O. C. & & A. R. 
4s Mey stsee eto lar sans Ne aver 13 UL. &T, ss 
Union City P. & E. Depot. . Accepted elev ation established by| 
levels from thelake ........ ./| 1270 
5‘ i ae . .| 177 |Above Fitusville by U. & T. profile 
(VAN Oe 8) & es eae (1271)| 
i a os - «| 1258 |Above ocean by ap & T. profile (VII). 
iM ee sr Soe loon P. & E. ug (Vid). 
“ec “ce “cc aS 12 |Too low on es &T. “ec | 
se i o ae 11 P. & E. et ae 
aoe City 
L.S. & M.S. & P. & E. Cross’g.| 583 |Below Union City by P. & E. profile, 
(AW) IVE 0) ee a One | leas AURORE RCE 687 
Ee rs ss “ 583 Below Union City by levels run by J. | 
Jak AOR WANDA <8 hey Stee lye: Bile ich ciwe cree 687 
ze ae ss oP 676 Above ocean by P. & E, pr ofile ae 
Fe 2 ee ‘ 11 Too low on 
Erie City 
ES eS Depot tsi)» 0.72 ‘Below Erie Grossing (Carll’s levels). 686 
vs eT ES NGEE CEORe ‘Above ocean by L. 8S. & M.S. profile| 686 
(S15 Leb lah 8 vp ORI Oe a0 Joti ga ree 
re Loe ee” DR ae ae 113 Above lake by L.S. & M.S. profile (XI)| 
3; ee ees ener 113 | 'y Cariltsievels’. . 3... x 
AKC uEIri Gs sip cmcraene th chron ais’ PAS abOVe 686-113). ay. sls i eee eld 573 
This determination shows a very satisfactory line of levels from Pitts- 
