worth, 117 U.S. 139 (1886) the authority of which is
respected in the preceding case.

[1668] Chicago, B. & K.C.R. Co. _v._ Missouri ex rel. Guffey, 120 U.S.
569 (1887).

[1669] Ford _v._ Delta & Pine Land Co., 164 U.S. 662 (1897).

[1670] Vicksburg, S. & P.R. Co. _v._ Dennis, 116 U.S. 665 (1886).

[1671] Millsaps College _v._ Jackson, 275 U.S. 129 (1927).

[1672] Hale _v._ Iowa State Board of Assessment, 302 U.S. 95 (1937).

[1673] Stone _v._ Farmers' Loan & Trust Co. (Railroad Commission Cases),
116 U.S. 307, 330 (1886) extended in Southern Pacific Co. _v._ Campbell,
230 U.S. 537 (1913) to cases in which the word "reasonable" does not
appear to qualify the company's right to prescribe tolls. _See also_
American Toll Bridge Co. _v._ Railroad Com. of California et al., 307
U.S. 486 (1939).

[1674] Georgia R. & Power Co. _v._ Decatur, 262 U.S. 432 (1923). _See
also_ Southern Iowa Electric Co. _v._ Chariton, 255 U.S. 539 (1921).

[1675] Walla Walla _v._ Walla Walla Water Co., 172 U.S. 1, 15 (1898).

[1676] Skaneateles Water Works Co. _v._ Skaneateles, 184 U.S. 354
(1902); Knoxville Water Co. _v._ Knoxville, 200 U.S. 22 (1906); Madera
Water Works _v._ Madera, 228 U.S. 454 (1913).

[1677] Rogers Park Water Co. _v._ Fergus, 180 U.S. 624 (1901).

[1678] Home Telephone Co. _v._ Los Angeles, 211 U.S. 265 (1908);
Wyandotte Gas Co. _v._ Kansas, 231 U.S. 622 (1914).

[1679] _See also_ Puget Sound Traction, Light & P. Co. _v._ Reynolds,
244 U.S. 574 (1917). "Before we can find impairment of a contract we
must find an obligation of the contract which has been impaired. Since
the contract here relied upon is one between a political subdivision of
a state and private individuals, settled principles of construction
require that the obligation alleged to have been impaired be clearly and
unequivocally expressed." Justice Black for the Court in Keefe _v._
Clark, 322 U.S. 393, 396-397 (1944).

[1680] Corporation of Brick Church _v._ Mayor et al., 5 Cowen (N.Y.)
538, 540 (1826).

[1681] West River Bridge Co. _v._ Dix, 6 How. 507 (1848). _See also_
Backus _v._ Lebanon, 11 N.H. 19 (1840); White River Turnpike Co. _v._
Vermont Cent. R. Co., 21 Vt. 590 (1849); and Bonaparte _v._ Camden &
A.R. Co., 3 Fed. Cas. No. 1,617 (1830); cited in Calvert I, 960-961.

[1682] Pennsylvania Hospital _v._ Philadelphia, 245 U.S. 20 (1917).

[1683] Illinois Central Railroad _v._ Illinois, 146 U.S. 387, 453, 455
(1892).

[1684] _See_ pp. 335-