Transactions of The Academy of Science of St. Louis. 
VOL. XXIII, No, 9. 
A STUDY OF THE PROPERTIES OF INTEGRAL 
NUMBERS. 
NEW EVIDENCE OF A RELATION BETWEEN GRAVI- 
TATION AND ELECTRICAL ACTION AND OF 
LOCAL CHANGES IN THE ELECTRICAL 
POTENTIAL OF THE EARTH. 
FRANCIS E. NIPHER. 
Issued Mareh 2, 1920. 
