IV CDNTENTS. 



XIV. The Action of Sulphur Trioxide on Silicon Tetrachloride. By 



C. R. Sanger and E. R. Riegel 573 



XV. An Electric Heater and Automatic Thermostat. ByA. L.Clark 597 



XVI. Cretaceous Pityoxyia from Cliff wood, New Jersey. By Ruth 



HOLDEN 607 



XVII. On the Scalar Functions of Hyper Complex Numbers. By 



Henry Taber 625 



XVIII. Preliminary Study of the Salinity of Sea Water in the Bermudas. (^ "7 | 



By K. L. Mark '-^Qff 



XIX. On Certain Fragments of the Pre-Socratics: Critical Notes and 



Elucidations. By W. A. Heidel 679 



XX. The Structure of the Gorgonian Coral Pseudoplexaura crassa 



Wright and Studer. By W. M. Chester 735 



XXI. Records of Meetings 777 



Biographical Notices: 



Robert Amory. By R. H. Fitz . 805 



Abbott Lawrence Rotch. By R. DeC. Ward 807 



Charles Robert Sanger. By. C. L. Jackson 813 



Officers and Committees for 1913-14 823 



List of Fellows and Foreign Honorary Members 825 



Statutes and Standing Votes 839 



RuMFORD Premium 853 



Index 855 



