The Cosmos Press

EDW. W. WHEELER

CAMBRIDGE, MASS.

199193

CONTENTS.

PAGE

I.

On the Ultra Violet Component in Artificial Light. BY LOUIS

BELL

1

II. Alexander Agassiz. BY HENRY P. WALCOTT

31

III. A Theory of Linear Distance and Angle. By H. B. PHILLIPS

and C. L. E. MOORE

45

IV.

Preliminary Diagnoses of New Species of Chaetomium. By A.

H. CHIVERS

81

V. A Study with the Echelon Spectroscope of Certain Lines in the

Spectra of the Zinc Arc and Spark at Atmospheric Pressure.

BY NORTON Α. ΚΕΝΤ

.

VI. The Impedance of Telephone Receivers as affected by the Motion

of their Diaphragms. BY A. E. KENNELLY and G. W. PIERCE

91

111

VII.

New or Critical Laboulbeniales from the Argentine. BY ROLAND

THAXTER

155

VIII. Culture Studies of Fungi producing Bulbils and Similar Propaga-

tive Bodies. By J. W. HOTSON

225

IX. Thermodynamic Properties of Liquid Water to 80° and 12000

Kgm. BY P. W. BRIDGMAN

307

X. Preliminary Descriptions of New Species of Rickia and Treno-

myces. BY ROLAND THAXTER

363

XI. The Space-Time Manifold of Relativity. The Non-Euclidean

Geometry of Mechanics and Electromagnetics. BY E. B.

WILSON and G. N. LEWIS

387

XII. On the Existence and Properties of the Ether. By D. L. WEBSTER 509

XIII. The History, Comparative Anatomy and Evolution of the Arau-

carioxylon Type. BY E. C. JEFFREY

531

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. BY A. L. CLARK 597

XVI. Cretaceous Pityoxyia from Cliffwood, 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.

BY K. L. MARK

666

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