10 
HAYFORD. 
a still closer mathematical approximation to the unknown 
laws of motion of the pole. The interesting feature of this 
investigation is now that the theorists are at sea, so to speak. 
Will they at the end of the five years be able to furnish an 
adequate explanation for the new facts observed or, indeed, 
for those already known ? It is on this theoretical side of 
the investigation that new energy is needed. Here is a 
golden opportunity for some one well versed in mechanics, 
astronomy, and geodesy. 
