CONTENTS 



Original Papers 



Page 



Mathematics. — Account of researches in the algebra of physics. I. A. 



Macfarlane 331 



Physics. — The melting points of fire bricks. C. W. Kanolt 337 



Chemistry. — Notes on chemical stability. F. W. Clarke 339 



Botany.— Clastotypes, clonotypes and spermotypes, means for multiplying 



botanical type specimens. Walter T. Swingle 344 



Botany. — Phototypes, a means for wide distribution of type material. 



Maude Kellerman, 346 



Abstracts 



Mineralogy 349 



Geology 349 



Botany ! ... 353 



References 355 



Proceedings 

 Geological Society of Washington 357 



