231. Raman Spectra of Benzene and Diphenyl.
232. Ball Lightning.
233. Stereophotographic Models of Electron Motion in Stark Effect.
234. Selective Thermal Radiation of Coloured and Pure Fused Quartz. (Quartz Containing Neodymium).
235. Nuclear Spin of Potassium (with F. W. Loomis).
236. Absorption Spectra of Salts in Liquid Ammonia.
237. Raman Effect for Benzene Substitution Products.
238. Analysis of Complicated Band Spectra with the Aid of Magnetic Rotation Spectra (with G. H. Dieke).
239. Raman Spectra of a Series of Normal Alcohols and Other Compounds (with G. Collins)
240. Remarkable Optical Properties of the Alkali Metals.
241. Influence of Nitrogen and Carbon Dioxide upon the Absorption Spectrum of Mercury Vapor (with H. W. Straub)
242. Raman Spectrum of Heavy Water.
243. Raman Spectrum of Heavy-Water Vapor.
244. Ultra-Violet Absorption of Heavy Water Vapour (with J. Franck)
245. Comment on Paper by Langsdorf and Dullridge on Optical Rotation of Unpolarized Light.
246. The Purple Gold of Tut-Ankhamun.
247.
248. Raman Spectrum of Heavy Chloroform (with D. H. Rank).
249. Far Ultra-Violet Absorption Spectra and Ionisation Potentials of Benzenes C6H6 and C6D6 (with W. C. Price).
250. Raman Spectrum of Heavy Benzene C6D6.
251. Anomalous Diffraction Gratings.
252. Fluorescence of Chlorophyll in Its Relation to Photochemical Processes in Plants and Organic Solutions. (with J. Franck).
253. Optical and Physical Effects of High Explosives.
254. Raman Spectra of Deuteroparaldehyde and Paraldchyde.
255. Recent Improvements in Diffraction Gratings and Replicas.
256. Spectrum of the Arc in Hydrogen (with G. H. Dieke).
257. Optical Properties of Alkali Metals (with C. Lukens).
258. Negative Bands of N14 - N15 (with G. H. Dieke).
259. Nuclear Spin of N15 (with G. H. Dicke).
260.
261. The Negative Bands of the Heavy Nitrogen Molecule (with G. H. Dieke).
262. Fire-fly "Spinthariscope".
263. Presence of a Hitherto Unrecognized Nicotinic Acid Derivative in Human Urine (with V. A. Najjar).
264. Diffraction Gratings for Astro-physical Research.
265. Animated Crystals of Proto-catechuic Acid.
266. Improved Diffraction Gratings and Replicas.
267. The Use of Echelette Gratings in High Orders.
268. Spontaneous Deformation of Protocatechuic Acid Crystals.