32 
FIFTEENTH REPORT. 
same result, infra terrestrial gravitation pin* “some form of tidal force" 
as lie puts it. which is to say. plus ortru terrestrial gravitation. 
Mr. Taylor has taken a most significant step in daring thus to give 
expression to a belief that geology must look to extraterrestrial force 
for the explanation of one of ils major problems. 
What matters it at this time in what precise form we may severally 
picture to ourselves this deformation? The grand conception is stated 
that the greatest deformation of the earth mass since the close of 
Mesozoic time, the corrugation of the earth's surface with the Tertiary 
mountain belt, was produced through the action of extram imdane force! 
Even if it be shown, as I believe it can be, that the Tertiary events re- 
sulted from the (pre-Tertiary) removal of earth mass, this merely trans- 
fers a part of the cause backward in point of time, it does not eliminate 
it. and so. after all, the conception loses none <>f its suggestiveness. 
HOW Alt r> B. BAKER- 
