CONTENTS. IX 
HAMBURGER (tH. J.) presents a paper of Dr. A. W. Visser: “A few observations 
on autocatalysis and the transformation of y-hydroxy-acids, with and without 
addition of other acids, conceived as an ion-reaction”’. 760. 
HEAT OF MIXING (On the latent) for associating solvents. 174. 
HEUSE (w.) and H. KAMERLINGH ONNEs. On the measurement of very low tem- 
peratures. V. The expansioncoéfficient of Jena- and Thüringer glass between 
+ 16° and — 182°C. 674. 
HOEK (P. P. c.). An interesting case of reversion. 90. 
HOFF’s LAW (Van ’t) (Kinetic derivation of) for the osmotic pressure in a dilute 
solution. 729. 
HOLLEMAN (a. F.). The preparation of silicon and its chloride. 189. 
— The nitration of disubstituted benzenes. 266. 
— On the preparation of pure o-toluidine and a method for ascertaining its 
purity. 395. 
— presents a paper of Dr. J. Borsrxen: ‘The reaction of Frreprn and Crarrts”. 470. 
— presents a paper of Dr. F. M. Jarcer: “On Orthonitrobenzyltoluidine”. 666. 
— presents a paper of Dr, I. M. Jazcer: “On position-isomeric Dichloronitro- 
benzenes”’. 668. 
HONDSRUG (The) in the province of Groningen. 500. 692, 
HUBRECHT (A. A. W.) presents a paper of Prof. Tu. ZinuneN : “On the development 
of the brain in Tarsius spectrum’. 331. 
HUISKAMP (w.). On the presence of fibringlobulin in fibrinogen solutions. 610. 
NYDRAZINE and water (The viscosity of the system). 329. 
HYDROXY-AcIDs (A few observations on autocatalysis and the transformation of y-), 
with and without addition of other acids, conceived as an ion-reaction. 760. 
HYMENOPSIS TYPHAE (Fuck.) Sace. (On) a hitherto insufficiently described Tubercula- 
riacea, occurring on the withered leafsheaths of Typha latifolia, 206. 
ICE (On the melting of floating). 459. 
ICE MOTION over the Netherlands (On the direetion and the starting point of the 
diluvial). 40. 
INERTIA (On moments of) and moments of an arbitrary order in spaces of arbitrary 
high rank. 596. 
INNERVATION (Note on the) of the Trunkmyotome. 708, 
INTEGRALS (Evaluation of two definite), 201. 
— (The values of some definite) connected with Bessel functions. 375. 
INTERPOLATION (A new method of) with compensation applied to the reduction of the 
corrections and the rates of the standardeloek of the Observatory at Leyden, 
Hohwü 17, determined by the observations with the transitcircle in 1903, 241, 
INTRAMOLECULAR atomic rearrangements in benzpinacones, 271, 
INTRAMOLECULAR OXYDATION (On the) of a SH-group bound to benzol by an ortho- 
standing NO,-group. 63. 
INTRAMOLECULAR REARRANGEMENTS (On), 329. 
INTRAMOLECULAR TRANSFORMATION (The) in the stereoisomerie z+ and (-trithioacet and 
a- and #-trithiobenzaldehydes. 329, 
