Ji CONTENTS. 



Anatomy. A. J. How: "On the relation between the quantity of white and grey 

 substance in the central nervous system". 311. 



— J. W. VAN WiJiiE: "Metamorphosis of Araphioxus lanceolatus". 574. 



A. J. P. VAN DKN Broek : "On pteric sutures and pteric bones in the human 



skull". 634.. 

 Y. Theunissen: "The arrangement of the motor roots and nuclei in the bnn'n 



of Acipenser ruthenus and Lepidosteus osseus". 1032. 

 ANHYDRIDES (The mcchaiiism of the acid formation of aliphatic acid) in an excess of 



water. 718. 



— (On a new method of preparing- carboxylic). 9f)9. 



ANii.rNK (Concerning combinations of) with hydrochloric acid. 553. 



ANIMALS (On the reflectorical influence of the thoracal autonomical nervous system 



on the rigor mortis in cold-blooded). 952. 

 ANISOTROPOUS ]K)DIES (On temperature-measurenients of) by means of radiation-pyro- 

 meters. 799. 



ANOPiiTiiALMOS (On the visual centra in the brain of an). 186. 

 ANTIBODIES (On the formation of) after injection of sensitized antigens. 6t0. 

 ANTIGENS (On the formation of antibodies after injection of sensitized). 640. 

 ANTIMONY (The ellect of temperature pud transverse magnetisation on the continuous 



current resistance of crystallized). 1110. 

 APPARATUS (An) for the determination of gas isotherms up to about 3000 atm. 75 t. 822. 

 ARGON (The vapour pressure of solid and liquid) from the critical point down to — 



206° C. 477. 

 A RISK (l.), On the Tyndall phenomenon in gelatin-solutions. 331. 



— Variations of state of gelatin-solutions. 418. 



ARisz (\v. II.). Positive and negative phototropy of the apex and base in oat-seedlings 

 (Avena sativa). 363. 



— Adjustment to light in oats. 615. 



Astronomy. J. £. de Vos van Steenwijk: "Investigation of the inequalities of 

 approximately monthly period in the longitude of the moon, according to the 

 meridian observations at Greenwich". 124 Part. 2. 141. Addendum. 890. 



— E. F. VAN de Sande Bakhuvzen: "On the signiticance of the term in the right 

 ascension of the moon, found by J. E. de Vos van Steenwijk". 144. 



— W. DE Sitter: 'On canonical elements". 279. 



— W. DE Sitter: "On the constancy of the velocity of light". 395. 



ASCENSION of the moon, (On the significance of the term in the right) found by J. E. 



DE Vos VAN Steenwijk. 144. 

 atomic weights (The red lithium line and the spectroscopic determination of). 155. 

 auscultation (On esophageal) and the recording of esophageal heart sounds. 1041. 

 avena sativa (Positive and negative phototropy of the apex and base in oat-seedlings). 363. 

 AXES of the margin (On zonal araphiboles in winch the plane of optic) is normal to 



that of the central part. 275. 

 BACKER (h. J.). On the nitration of methylurea. 770. 



