CONTENTS 



Original Papers 



Page 

 Physics. — Standard substances for the calibration of viscometers. Eugene 



C. Bingham and Richard F. Jackson 63 



Chemistry.— Some problems of the oxides of iron. Robert B. Sosman. ... 55 

 Geology. — Note on the diffusion of sodium chloride in Appalachian oil-field 

 waters. G. B. Richardson 73 



Abstracts 

 Geology 76 



Proceedings 



The Philosophical Society 79 



The Geological Society 80 



The Botanical Society 83 



