X CONTtNTS 



HAMBURGER (h. J.) aiicl R. Brinkmax. The conduct of the kidneys towards some 



isomeric sugars (Glucose, Fructose, Galactose, Mannose and Saccbarose, Maltose, 



Lactose). 548. 

 HARVARD MAP of the Sky (The distance-correction for the plates of the). 1213. 

 HEAT of Dissociation (On the) of Di-atomic Gases in Connection with the Increased 



Valency-Attractions l/^ of the Free xVtoms. 644. 

 HERINGA (ö. c). On the Peripheral Sensitive Nervous System. 2ö. 

 HERWERDEN (miss m. A. VAN). Etiects of the Rays of Kadium on the Oogenesis 



of Daphnia pulex. 540. 

 HEYST (f. a. van), C. Schoute aud N. E. Groenkveld Meyer. An instrument 



to be used by the pilot of an aeroplane to measure the vertical velocity of the 



machine. 468. 

 HOGEWiND (f.) and H. Zwaardemaker. On the spontaneous transformation to a 



colloidal state of solutions of odorous substances by exposure to ultraviolet light. 131. 



— and H. Zwaardemaker. On the Photo-electricity of Gels. 1146. 

 iiOhLEMAN (a. p.) J presents a paper of Dr. A. H. W. AïEN : "The Passivity of 



Chromium". 3rd Communication. 13S. 



— Eykman's Refractoraetric Investigatious, in Counecticm with the Presentation 

 of the Edition of his Works. 1200. 



— and B. F. H. J. Matthes. The Addition of Hydrogenbromide to Allylbromide. 90. 

 HOLST (ü.), L. Hamburger and E. Oosterhujs. On the influence of ditlerent sub- 

 stances on the absorption of light by thin tungsten layers 1078. 



— and A. N. Koopmans. The ionisation of argon. 1089. 



— and E. Oosterhuis. The audion as an amplitier. 932. 



HOOGEWERFF (s.) presents a paper of Prof. A. Smits and J. .\I. Hyvoet : "On the 

 System Iron-Oxygen". 386. 



— presents a paper of Prof. A. Smits and V. S. F. Berckmans : "On the System 

 Ether-Chloroform".. 401. 



HORNS and Antlers (Androgenic origin of). .570. 



host plant (The significance of the tubercle bacteria of the Papilionaceae for the). 183. 



HUEBER (a. a.) On Musculus Transversus Orbitae. 1007. 



HUIZING A (m J.). The Unidirectional Resistance of Crystal Detectors. 1248. 



HULSHOF F POL (D. J.) V. PoL (D. .J. HuLSHOFF). 



HYDRATE of Sulphuretted Hydrogen (On an Indirect Analysis of Gas-Hydrates by a 

 Thermodynamic Method and Its Application to the). 1204. U. 1338. 



HYDROGEN (On the Course of the Values of a and b for) at Diti'erent Temperatures 

 and Volumes. III. 2. IV. 16. 



HYDROGENBROMIDE (The Addition of) to Allylbromide. 90. 



HYPERION (On the perturbations in the motion of) proportional to the first power of 

 Titan's eccentricity. 1164. 



Hyperion's pericentre (The longitude of) and the mass of Titan. 881. 



IGNEOUS ROCKS (On the Age of the) in the Moluccas. 803. 



INNERVATION (The sympathetic) of the cross-striated muscle fibres of vertebrates. 1227. 



— (Once more the) and the tonus of the striped muscles. 1238. 



