550 CORPORATIONS. [ART. 23

of all kinds of metals; provided, said corporations carry on
their general operations in this State, and have their principal
office therein.

1888, art. 23, sec. 22. 1868, ch. 471, sec. 22.

26. Class 11. For opening and working quarries of marble,
slate or other economic minerals or mineral substances in this
State, and for the manufacturing thereof in this State, and for
the transportation or exportation and sale thereof.

Ibid. sec. 23. 1868, ch. 471, sec. 23.

27. Class 12. For boring for, opening, using or refining
petroleum, salt or other mineral springs in this State, and for
boring for, opening, using or refining in this State, other oils,
where the principal office of said corporation is located in
this State.

Ibid. sec. 24. 1868, ch. 471, sec. 24. 1884, ch. 360. 1886, ch. 161.

28. Class 13. For constructing, owning or operating tele-
graph or telephone lines in this' State, where the principal
office of said corporation is located in this State, and for the
transaction of any business in which electricity over or through
wires may be applied to any useful purpose.

Electric Light Co. v. Frederick City, 84 Md. 606.

Ibid. sec. 25. 1868, ch. 471, sec. 25.

29. Class 14. For navigating the ocean by steam, sail or
other ships or vessels, and transportation of goods and passen-
gers therein, where the principal port of entry or departure
thereof is in the United States, and the principal business office
of said corporation is located in this State.

Ibid. sec. 26. 1868, ch. 471, sec. 26.

30. Class 15. For navigating the waters of this and adjoin-
ing States by steam, sail or other boats or vessels, and for the
transportation of goods and passengers therein, where the
principal office of said corporation is located in this State.

Ibid. sec. 27. 1868, ch. 471, sec. 27.

31. Class 16. For carrying on any forwarding or warehouse-
ing business in this State, and for the construction, owning,