the surface cohesion of the two metals.

To the present writer this seems the actual sequence of
phenomena, viz., a redistribution of the charges of the surface
atoms of the metals, a consequent change in surface cohesion
and a resultant oxidation of one of the metals.



ON CERTAIN RESEMBLANCES BETWEEN THE EARTH AND A BUTTERNUT

BY PROFESSOR A, C. LANE

TUFTS COLLEGE

THE drama of the earth's history consists in the struggle
between the forces of uplift and the forces of degradation. The
forces of uplift are mainly the outward expression of the inner
energy and heat of the earth, whether they be the volcano
belching its ashes thousands of meters into the air, or the
earthquake, with the attendant crack or fault in the earth's
crust, leading to a sudden displacement, and sending, far and
wide, a death-dealing shock, or those mountain-building
actions, which, though they may be as gentle and gradual as
might be produced by the breathing of mother earth and the
uplifting of her bosom thereby, nevertheless, end in the huge
folds of our mountain ranges.

Against these, there are always working the forces of
degradation--the slow rotting of weathering caused by the