CONTENTS 



Original Papers 



Page 

 Physics.^An optical ammeter. Paul D. Foote 77 



Mineralogy. — Vivianite from the land pebble phosphate deposits of Florida. 

 Thomas L. Watson and Stapleton D. Gooch 82 



Petrology. — The significance of glass-making processes to the petrologist. N. 

 L. BowEN 88 



Abstracts 



Geology 94 



Paleontology 96 



Ornithology 96 



Proceedings 



Washington Academy of Sciences 98 



Geological Society 98 



Philosophical Society 102 



Scientific Notes and News 107 



