Heterocyclic Compounds. Part VII. Coumarins from Resaceto-
phenone and Cyclic-B-ketonic Esters.

NAZIR AHMAD CHOWDHRY AND R. D. DESAI

Diffraction of Light by Superposed Ultrasonic Waves

M. A. GOVINDA RAU

An Application of the Bi-Partitional Function Hg (P, Q) in the
Enumeration of Different Samples from Finite Population .

P. V. SUKHATME

Heterocyclic Compounds. Part VIII. Coumarins from Alkylcyclo-
hexanone-2-carboxylates and Trans-B-decalone-3-carboxylate

NAZIR AHMAD CHOWDHRY AND R. D. DESAI

On Linear Transformations of Bounded Sequences—II

.K. S. K. IYENGAR

Magnetic Anisotropy and Pleochroism of Biotite Mica

P. NlLAKANTAN

A Study of the Benzoin Reaction. VI. The Effect of Temperature
Variation on the Benzoin Reaction.

B. F. FERREIRA AND T. S. WHEELER

Diffraction of X-Rays in Organic Glasses.

T. M. K. NEDUNGADI

Raman Spectra of Some Organic Bi-Cyclic Compounds. Naphthalene,
Decaline, Tetralin, Indene, TrazB-Decalone, TransB-Decalol.

BLISHAMBHAR DAYAL SAKSKNA

The Normal Modes and Frequencies of the Sulphur Molecule

S. BHAGAVANTAM AND T. VENKATARAYUDU

Raman Spectrum and Specific Heat of Sulphur.

.S. BHAGAVANTAM AND T. VRNKATARAYUDU

The Normal Frequencies of Phosphorus (P4).

S. BHAGAVANTAM AND T. YENKATAHAYUDU

Diffraction of Light by Ultrasonic Waves.

K. NAGABUSHNA RAO

On Linear Transformations of Bounded Sequences—III .

K. S. K. lYENGAR

Colour in Relation to Chemical Constitution of the Organic and
inorganic Salts of Jsonitroso-diphenyl-thio-Barbituric Acid
and Its Higher Homologues and Analogues

(MISS )IONE NITRAVATI DHARAM DASS AND SlKHIBHTTSHAN DUTT

A Theorem in the Additive Theory of Numbers .

INDER CHOWLA

Quasi-boolean Algebras and Many-Valued Logics.

B. VAIDYANATHASWAMY

Coefficient of Viscosity of Air.

V. D. MAJUMDAR AND M. B. VAJIFDAR

Studies in Turbine Geometry—II. On the Sub-Geometries of Lie
which belong to the Mobius-Laguerre Pencil.

A. NARASINGA RAO

Dyes derived from Chrysoquinone...........

KUNWAR MAHENDRA PRATAP SINGH AND SNKHIBHUSHAN DUTT

Studies in the Friedel-Crafts Reaction. Part IV. The Action of .
Acety! Chloride and Acetic Anhydride on Resorcinol and its
Derivatives. An Evidence for y-Substitution in the Resorcinol
Nucleus.

.R. D. DESAI AND M. EKHLAS

Diophantische Probleme .

YON ALFRED MOESSNER AND A. GLODEN

Derivatives of Salicylic Acid. Part XIII. Chlorosalicylic Acids
and Their Methyl Ethers .... (The late)

N. W. HIRWJE, .K. N. RANA AND (Miss) K. D. GAVANKAR

Nuclear Methylation of Resacetophenone. Preparation of 3-
Methylresacetophenone and Its Derivatives.

.S.RANGASWAMI AND T. R. SESHADRI

A Fine Adjustment Device for Use with the Micro-Dumas Apparatus

S. RANGASWAMI

Generalization of a Theorem of Dickson .

INDER CHOWLA

Note on Harmonic Functions .

Y. R.THIRUVENKATACHAR

A Remark on g (n)

.S. CHOWLA

On an Infinite System of Non-Linear Integral Equations

S. MlNAICSHI SUNDARAM

Sir C. V. Raman's Fiftieth Birthday ....

B.S.M. & C.S.V.

Prefatory Note to the Special Number.

.B.S M

On Thermal Dependence of Elasticity in Solids .

LEON BRILLOUIN

Studien Zum Raman-Effekt. Mitteilung LXXXIX: Aethylenoxyd.

K. W. F. KOHLRAUSCH UND A. W. REITZ

Light Scattering in Anisotropic Media

HANS MUELLER

Untersuchung von Schallamplituden-Feldern Mittels Einer Methode
der Isochromaten

HIEDKMANN UND K. OSTERHAMMEL

Uber Biologische Wirkungen Ultravioletter Lichtquanten.

P. JORDAN

The Dispersion of the Ultrasonic Velocity in Liquids .

R. BAR

A Statistical Analysis of Trends in Research on the Raman Effect .

JAMES H. HIBBEN

Spectres Raman et Spectres D'Absorption Infrarouge de Composes
ou L'Azote est Tetracoordonne

MME MARIE FREYMANN ET RENE FREYMANN

Some Remarks on Reciprocity.

MAX BORN

Raman Spectra and Molecular Configurations of Solid Ethylene
Dihalides .

SAN-ICHIRO AND YONEZO MORINO

Studien Zum Raman-Effekt. Mitteilung XC: Parasubstituiertes
Acetophenon

.L. KAHOVEC UND J WAGNER

Studien Zum Raman-Effekt. Mitteilung XCI: Asymrnetrisches
Phthalyl-Chlorid.

L. KAHOVEC

The Raman Spectra of Volatile Fluorides. Applications of Raman
Spectra to Chemical Problems.

DON M. YOST

The Relation between the Force Constant, the Inter-Nuclear Distance,
and the Dissociation Energy o£ a Diatomic Linkage .

G. B. B. M. SUTHERLAND

Interpretation of Raman Spectra in Crystals: Anhydrite and Gypsum

S. BHAGAVANTAM

Normal Frequency of the Diamond Lattice .

T. VENKATARAYUDU

Theoretische BemerkungenZum R. S. Krishnan's Reziprozitatsgesetz
der Kolloid-Optik.

V. S.V VRKLJAN

Effet Raman et Structure des Composes AX5: Pentachlorure de
Phosphore et Homologues . .

HENRI MOUREU ,MICHEL MAGAT ET GEORGES WETROFF

Durchrechnung Einiger Ausgewahlter Molekiil-Modelle

OTTO BURKARD

Eigenschwingungen Mechanischer Molekiilmodelle. IV. Der
Viererring.

F. TRENKLER

Scattering of Light in a Rochelle Salt Crystal

L. SIBAIYA

The Scattering of Light in Sodium Nitrate Crystals. Part I.

T. M. K. NEUUNGADI

Sullo Spettro Raman Di Alcuni Idrocarburi Paraffinici

G. B. BONINO E R. MANZONI ANSIDEI

A Chart o£ the Raman Bands of Water in Crystals. P. G. 1ST.

P. G. N. NAYAR

Studien Zum Raman-EfTekt. Mitteilung XCII: Das Ramanspektrum
des dimeren Ketens .

K. W. F. KOHLRAUSCH UND R. SABATHY

Studien Zum Raman-Effekt. Mitteilung XCIII: Cyclobutan-1,2-
dicarbonsauren und Abkommlinge.

K. W. F. KOHLRAUSCH UND R. SABATHY

The Anomalous Depolarisation of Light-Scattering in Optical
Glasses

R. S. KRISHNAN

Low Frequency Raman Lines in Organic Crystals

C. S. VENKATESWARAN

Depolarisation of Unmodified Light-Scattering in Liquids

BlSHAMBHAR DAYAL SAXENA

The Raman Effect and Multiple Scattering of Light .

A. KASTLER

Studien Zum Rarnan-Effekt. Mitteilung XCIV: Tetrolsaure und
Ester.

O. BALLAUS

Directional Variations in the Absorption and the Fluorescence of
the Chrysene Molecule .

K. S. KRLSHNAN AND P. K. SESHAN

The Diffraction of Light by Supersonic Waves.

S. NAGENDRA NATH

Oertliche Empfindlichkeits-Unterschiede in der Schichte der Photo-
graphischen Platte .

O. PAULSEN UND A. W. REITZ

Studien Zum Raman-Effekt. Mitteilung XCV: Stickstoffkorper XII.
(Nitrogrupp.e.) .

E. PENDL, A. W. REITZ UND R. SABATHY

Raman Effect and Chemical Constitution. Influence of Constitutive
and Other Factors on the Double Bonds in Organic Compounds.
Part I—Coumarin . .

G. V. L. N. MURTI AND T. R. SESHADRI

On An Inequality Concerning Lattice Sums.

B. S. MADHAVA RAO AND K. VENKATACHALA IYENGAR

Raman Spectra of Terpenes.

.W. ROGIE ANGUS

Heterocyclic Compounds. Part IX. Coumarins from Substituted
Resacetophenones and Ethyl Aceto-acetate..

R. D. DESAI AND M. EKHLAS