CONTENTS. 
ABSORPTION- and extinction measurements (Photographic). Contributions to 
the study of liquid crystals. V. Extinction-measurements. 807. 
ACCELERATION OF SOLUBILITY (On the) of metals in acids by reducible 
compounds. 1449. 
Acip (On the crystalforms of some substituted amides of para-toluene- 
sulphonic). 347. 
Acips (The solubility of some organic) in fatty oils. 783. 
— (On the acceleration of solubility of metals in) by reducible 
compounds. 1449. 
ADAPTATION (On smelling during complete exhaustion, resp.) for a given 
odour. 1442. 
ADIABATIC INVARIANTS (On the determination of quanta-conditions by means 
of). 826. 
ADRENAL CORTEX (Concerning the influence of the) upon the growth and 
the reproduction of lower organisms and its presumable antitoxis 
action. 1339. 
ApsoRPTION (On) of poisons by constituents of the animal body. II. The 
adsorbent power of rabbit's serum for atropin. 486. 
— (On the) of odorous molecules to the surface of solids. 654. 
ALKALI (The influence of different substances on the decomposition of 
monoses by an) and on the inversion of cane sugar by hydro-chloric 
acid. 149, 
ALKALIROCKS (On the) of the Serra do Gericino to the northwest of Rio 
de Janeiro and the resemblance between the eruptive-rocks of Brazil 
and those of South-Africa. 1241. 
ALUMINATES (The) of sodium. Equilibriums in the system Na, O-Al, Os-H,O. 129. 
ALUMINIUM (The electromotive behaviour of). Il. 966. 
AMIDEs (On the crystalforms of some substituted) of para-toluenesulphonic 
acid. 347. 
AMINES (On some condensation-products of aromatic aldehydes and). 74. 
Analyse mathématique. ARNAUD DENJoy: “Sur une propriété de séries 
trigonométriques.’ 220. 
Anatomy. L. Bork: “On the index cephalicus and the absolute dimensions 
of the head of the population of Holland.” 103. 
— M. W. WOERDEMAN: “On a human ovary with a large number of 
abnormal follicles and the genetic significance of this deviation.” 448. 
94 
Proceedings Royal Acad. Amsterdam. XXIII. 
