University Press:

JOHN WILSON AND SON, CAMBRIDGE, U.S. A.

192140

CONTENTS.

I. Studies in the Eupatorieae: (I.) Revision of the Genus Piqueria;

(II.) Revision of the Genus Ophryosporus; (III.) The Genus

Helogyne and its Synonyms; (IV.) Diagnoses and Synonymy of

Eupatorieae and of Certain Other Compositae which have been

Classed with them. By B. L. ROBINSON

II. Architectural Acoustics: (I.) Introduction; (II.) The Accuracy

of Musical Taste in regard to Architectural Acoustics; (III).

Variation in Reverberation with Variation in Pitch. BY W. C.

SABINE

PAGE

1

49

III. On the Permeability and the Retentiveness of a Mass of Fine Iron

Particles. BY B. O. PEIRCE

85

IV. On the Length of the Time of Contact in the Case of a Quick Tap

on a Telegraph Key. By B. O. PEIRCE

93

V. Some Stages in the Spermatogenesis of the Honey Bee. BY E. L.

MARK AND M. COPELAND.

101

VI. Friction and Force due to Transpiration as Dependent on Pressure

in Gases. By J. L. HOGG.

113

VII. On the Conditions to be Satisfied if the Sums of the Corresponding

Members of Two Pairs of Orthogonal Functions of Two Vari-

ables are to be Themselves Orthogonal. By B. O. PEIRCE.

VIII. On the Correction for the Effect of the Counter Electromotive Force

induced in a Moving Coil Galvanometer when the Instrument is

used Ballistically. BY B. O. PEIRCE.

147

159

IX. A Simple Device for Measuring the Deflections of a Mirror Gal-

vanometer. BY B. O. PEIRCE

171

X. On the Cytology of the Entomophthoraceae. By L. W. RIDDLE. 175

XI. A Revision of the Atomic Weight of Bromine. By G. P. BAXTER 199

PAGE

XII. The Optic Chiasma of Teleosts: A Study of Inheritance.

A. P. LARRABEE

XIII. Fluorescence and Magnetic Rotation Spectra of Sodium Vapor,

and their Analysis. BY R. W. WOOD

BY

215

233

XIV. Results of the Franco-American Expedition to Explore the Atmos-

phere in the Tropics. BY A. L. ROTCH.

261

XV. An Approximate Law of Fatigue in the Speeds of Racing Ani-

mals. BY A. E. KENNELLY.

273

XVI. An Experimental Study of the Image-Forming Powers of Various

Types of Eyes. BY L. J. COLE

333

XVII. Expansion and Compressibility of Ether and of Alcohol in the

Neighborhood of their Boiling Points. By A. W. SMITH

419

.

XVIII. The Hydroids of Bermuda. BY E. D. CONGDON

461

XIX. The Spermatogenesis of the Myriapods. (V.) On the Sperma-

tocytes of Lithobius. BY M. W. BLACKMAN

487

XX. Revision of the Genus Spilanthes. By A. H. MOORE

519

XXI. Concerning the Adiabatic Determination of the Heats of Combus-

tion of Organic Substances, especially Sugar and Benzol

BY

T. W. RICHARDS AND MESSRS. HENDERSON and FREVERT 571

XXII. On the Thomson Effect and the Temperature Coefficient of

Thermal Conductivity in Soft Iron between 1159 and 204° C.

BY E. H. HALL AND MESSRS. CAMPBELL, SERVISS, AND

CHURCHILL

.

.

XXIII. An Electric Wax-Cutter for Use in Reconstructions. By E. L.

595

XXIV. Concerning Position Isomerism and Heats of Combustion. By

L. J. HENDERSON

637

XXV. Temperature of Mars. A Determination of the Solar Heat

Received. BY P. LOWELL

649

XXVI. The Transmission of Röntgen Rays through Metallic Sheets. By

J. M. ADAMS

669

XXVII. The Process of Building up the Voltage and Current in a Long

Alternating-Current Circuit. BY A. E. KENNELLY

PAGE

699

XXVIII. The Determination of Small Amounts of Antimony by the

Berzelius-Marsh Process. BY C. R. SANGER AND J. A.