II CO N TE NSIS. 
Astronomy. A. PANNEKOEK : “The variability of the Pole-Star”. 1192. 
— W. ve Sitter: “A proof of the constancy of the velocity of light”. 1297. 
— H. G. van DE SANDE BAKHUYZEN: “The periodic change in the Sea-level at 
Helder, in connection with the periodic change in the latitude”. 1441. 
— W. H. Jvmus: “The total solar radiation during the annular eclipse on April 
17th 1912”. 1451. 
ATEN (A. H. W.). On a new modification of sulphur. 572. 
ATMOSPHERIC PRESSURE (The correlation between) and rainfall in the East Indian 
Archipelago, in connection with the 3,5 yearly barometric period. 454. 
ATROPHY (On localised) in the lateral geniculate body causing quadrantic heminopsia 
of both the right lower fields of vision. 840. 
AVENA SATIVA (The influence of temperature on phototropism in seedlings of). 1170. 
BAAT (Miss w. c. DE) and F. A, H. ScHREINEMAKERS. On the quaternary system 
KCl—CuC),—BaCl, —H,0. 467. 
BABEER (On the freshwater fishes of Timor and). 235. 
Bacteriology. C. Eykman: “On the reaction velocity of micro-organisms”. 629. 
BAKHUYZEN (E. F. VAN DE SANDE) presents a paper of Dr. H. J. Zwiers: 
‘Researches on the orbit of the periodic comet Hotes and on the perturbations 
of its elliptic motion”. V. 192. 
— presents a paper of Mr. N. Scuetrema: “Determination of the geographical 
latitude and longitude of Mecca and Jidda, executed in 1910—1911.” Part. I. 
527. Part. IL. 540. Part. IIL 556. 
— presents a paper of Dr. A. PANNEKOEK: “The variability of the Pole-Star”. 
1192. 
BAKHUYZEN (H. G VAN DE SANDE). The periodic change in the Sea-level 
at Helder in connection with the periodic change in the latitude. 1441. 
BEAUFORT (L. F. DE) and Max Weser. On the fresh-water fishes of Timor and 
Babber. 235. 
BECKMAN (ANNA) and H. KAMERLINGH ONNes. The piezo-electric and pyro- 
electric properties of quartz at low temperatures down to that of liquid hydro- 
gen. 1380. 
BECKMAN (BENG). Measurements on resistance of a pyrite at low temperatures 
down to the melting point of hydrogen. 1384. 
— and H. KAMERLINGH Onnes. On the Hatt-eflect and the change in the 
resistance in a magnetic field at low temperatures. L. 307. II. 319. ITT. 649. IV. 
659. V. 664. VI. 981. VII. 988. VIII. 997. 
— On the change induced by pressure in electrical resistance at low temperatures. 
A: 
BENZENE (Oxydation of petroleum, paraffin, paraffin oil and) by microbes. 1145. 
BENZENE NUCLEUs (On the velocity of substitutions in the) 1118. 
BDBWERINCK Qt. W.) presents a paper of Mr. H.J. WarerMan : “Mutation of Peni- 
cillium glaucum and Aspergillus niger under the action of known factors.” 124, 
— presents a paper of Prof J. BöEsEKEN and H.J, Waterman: “A biochemical 
method of preparation of d-tartaric acid” 212. 
