CoO. NOT EN TS. EV 
SQUARES (The investigation of the weights in equations according to the principle of — 
the least). 142. 
STEINER (On the combinatory problem of). 352. 
STEREOSCOPY (New methods of). 832. 
STOK (J. P. VAN DER). On frequencies of the mean daily cloudiness at Batavia. 
366. 
— On the duration of showers at Batavia. 555. 
— presents a paper of Prof. Kue. Dugors: “On a long-period variation in the 
height of the ground-water in the dunes of Holland”. 574. 
— presents a paper of Dr. C. Easton: “On Lockyer’s 35-year period in the 
solar-activity”. 842, 
STUYVAERT (M.). On certain twisted sextics, 346. 
SULFONISATION {On the) of benzol sulfonic acid. 511. 
SURFACES (Continuous one-one transformations of) in themselves. 788. 
— (On continuous vector distributions on). 850. 
SYSTEM of two components (The P-7-X-spacial figure for a) which are miscible in the 
solid or liquid crystalline state in all proportions. 165. 
— water-phenol (On plaitpoint temperatures of the). 394. 
— hydrogen bromide and bromine (On the). 504. 
— Copper sulphate, Copper chloride, Ammonium sulphate, Ammonium chloride 
and Water (The) at 30°. 615. 
TAMMES (TINE). Dipsacan and Dipsacotin, a new chromogen and a new colouring- 
matter of Dipsaceae. 509. 
TEMPERATURES (The breaking stress of glass and the use of glass tubes in measure- 
ments under high pressure at ordinary and low). 30. 
— On the change of the resistance of pure metals at very low) and the influence 
exerted on it by small amounts of admixtures. 345, 
— (Remarks on the Leyden observations of the ZrrMAN-eflect especially at low). 
360. 
— (The researches on the JouLE-KELviN-effect especially at low). 863. 874. 
— (On the measurement of very low). XXL, On the standardizing of temperatures 
by means of boiling points of pure substances. The determination of the vapour 
pressure of oxygen at three temperatures. 333. XXII. The thermo-element gold- 
silver at liquid hydrogen temperatures. 344. 
tescu {P). On the behaviour of fossil shells in water containing carbonic acid. 236. 
THALAMUS OPTICUS of man (About the function of the ventral group of nuclei in the). 
295. 
THEOREM of PAINLEVE (On a). 459, 
THEORY of binary mixtures (Contribution to the). VIL 146. VIII. 187. IX. 201. 
X. 317. XL. 426. XII. 477. XIII. 698. XLV. 816. XV. 890. 
— of capillarity (Statistical). 526. 
THERMODYNAMICS (On the kinetic derivation of the second law of). 303. 
THERMO- ELEMENT (The) gold-silver at liquid hydrogen temperatures, 344. 
TOLUENE (The nitration of). 248, 
