f. Influence and extent of glaciation.
g. Consequent lines of drainage:
(1) Arctic drainage. (2) Pacific drainage. (3) Atlantic drainage. (i) Direct. (ii) By St. Lawrence. (iii) By Gulf of Mexico.
C. Coast line:
a. Compare east and west coast as to:
(1) General form. (2) Number of harbors. (3) Availability of harbors. (4) Nearness to foreign ports.
D. Climate:
a. Position in reference to wind systems.
b. Summer and winter distribution and range of temperatures.