Vilt CO NT BIN DIS, 
weENTITY (The alleged) of red and yellow mercuric oxide. T. 273. IL. 407. 458. 
INDICAN-its hydrolysis and the enzyme causing the same. 512, 
— (Contribution to the knowledge of). 520. 
INDIGO (On the formation of) from the woad (Isatis tinctoria). 120. 
— (On the formation of) from Indigoferas and from Marsdenia tinctoria. 344, 
INDIGOFERAS (On the formation of indigo from) and from Marsdenia tinctoria. 344. 
INDIGO-FERMENTATION (On). 495, 
INTESTINE (The resorption of fat and soap in the large and the small). 234. 287. 
INVERSION (Studies on). 1st Part. 618. 
INVOLUTIONS of higher order (An application of the). 234. 
IODIDE (Mixed crystals of mercuric) and bromide. 81. 146. 
IRON (Some observations concerning an asymmetrical change of the spectral lines of) 
radiating in a magnetic field. 298. 
ISATIS TINCTORIA (On the formation of indigo from the woad). 120. 
ISODIALDANE (On). 81. 143. 
ISOMORPHOUS COMPOUNDS (On) of gold and mercury. 163. 
ISOPENTANE and carbon dioxide (On the critical isothermal-line and the densities o 
saturated vapour and liquid in). 574. 588, 
ISOTHERMAL LINE (On the critical) and the densities of saturated vapour and liquid in 
isopentane and carbon dioxide. 574. 588. 
ISOTIIERMALS (The determination of) for mixtures of HCl and CH, 40. 
JOACHIMSTHAL (The theorem of) of the normal curves. 593. 
JULIUS (Vv: A) presents a paper of Dr, A. Smits: Investigations with the micro- 
manometer.” 88. 
JUL1U8 (w. H.). Solar phenomena considered in connection with anomalous disper- 
sion of light. 467. 575. 
KAMERLINGH ONNES (H.) preseuts a paper of Dr. L. H. Siertsema: /Measure- 
ments on the magnetic rotation of the plane of polarisation in oxygen at different 
pressures.”’ 19. 
— Standard Gasmanometers. 29. 
— Methods and apparatus used in the Cryogenic Laboratory. I, 129. II. 406. 437. 
— presents a paper of Dr. Fritz HAZENOEHRL: /The dielectric coefficients of liquid 
nitrous oxide and oxygen.” 140. 211. 
— presents a paper of Dr. W. van BEMMELEN: 7On spasms in the terrestria 
magnetic force at Batavia.” 141. 202. 
— presents a paper of Dr. E. van Everpincen Jr,: „The Harr-effect and the 
increase of resistance of bismuth in the magnetic field at very low temperatures.” 
228. 229. 348. 
— presents a paper of Dr. J. E. VerscHarrFeLT: „On the critical isothermal line and the 
densities of saturated vapour and liquid in isopentane and carbon dioxide.” 574. 588. 
KAPTEYN (J. Cc) presents a paper of S. L. Veenstra: 7On the systematic correc- 
tions of the proper motions of the stars, contained in AUWERS’-BRADLEY Catalogue 
and the coordinates of the Apex of the solar moticn in space. 262. 
— The determination of the Apex of the solar motion. 353. 
KAP TE YN (Wi). On some special cases of Monce’s differential equation. 241, 326. 525. 
