VI CON TEN TS. 
Gas (On the calculation of the pressure of a) by the aid of the assumption of a 
canonical ensemble. 781. 
GAsES (Calculation of the pressure of a mixture of two) by means of G1sps’s statistical 
mechanics. 116. 
GEERTS (5. M.). Contribution to the knowledge of the cytological development of 
Oenothera Lamarckiana. 267. 
GEGENBAUER (An integral-theorem of). 749. 
GEOGRAPHICAL positions (Contributions to the determination of) on the West Coast 
of Africa. IIL. 88. Appendix. 107. 
Geology. K. Marvin: “The age of the layers of Sondé and Trinil on Java.” 185. 
— P. Tescu: “On the behaviour of fossil shells in water containing carbonic 
acid.” 236. 
— Eve. Dusois: “On a long-period variation in the height of the ground-water 
in the dunes of Holland.” 674. 
Geophysics. W. vAN BEMMELEN : “artheurrent-registration at Batavia’. 242. 
—- J. P. van ver Srox: “On frequencies of the mean daily cloudiness at Batavia”. 
366. 
— J. P. VAN DER Srox: “On the duration of showers at Batavia”. 555. 
— ©. Easton: “On Lockyen’s 35-year period in the solar activity”. 842. 
G1BBs’s statistical mechanics (Calculation of the pressure of a mixture of two gases 
by means of). 116. 
Grass tubes (The breaking stress of glass and the use of) in measurements under 
high pressure at ordinary and low temperatures. 30. 
GODEAUX (LUCIEN). The types of bilinear «*-complexes of M,_» in Sp. 625. 
GROUND=WATER (On a long period variation in the height of the) in the dunes of 
Holland. 674. 
HALE (The solar vortices of). 592. 
HAMBURGER (u. J.). The permeability of blood-corpuscles to caleium. 718. 
HARDNESS in muscles (About the determination of), 43. 
ueLIuM (The liquefaction of). 168, 
HOEK (P. P. C.). Some results of the investigation of the Cirripeds collected during 
the cruise of the Dutch man-of-war “Siboga” in the Malav Archipelago. 110. 
HOLLEMAN (A. F.) presents a paper of Dr. J.J. Buanksma: “Reduction of aromatic 
witro-compounds by sodium disulphide.” 42. 
— presents a paper of Prof. A. Smrrs and Mr. J. P. Wisaur: “The dynamic con- 
ception of a reversible chemical reaction.” 162. 
— The nitration of toluene. 248, 
— The nitration of p chlorotoluene. 257. 
— The quantitative estimation of the products of nitration of m-chloro- and m- 
bromobenzoic acid. 260. 
—- presents a paper of Dr. E.H. Bécnner and Miss B.J. Karsten: “On the system 
hydrogen bromide and bromine.” 504, 
HOLLEMAN (A. F) and J. J, Povak. On the bromation of toluol. 511, 
— On the sulfonisation of benzol sulfonic acid.” 511. 
