IV CTOENSTSEENDIES 
CARDINAAL (J.) presents a paper of Prof. FRED. SCHUH: “A general defini- 
tion of limit with application to limit-theorems.” 46. 
— presents a paper of Prof. Frep ScHuH: “A general definition of 
uniform convergence with application to the commutativity of limits.” 48. 
— presents a paper of Prof. J. A. SCHOUTEN: “On expansions in series 
of covariant and contravariant quantities of higher degree under the 
linear homogeneous group.” 251. 
— presents a paper of Prof. J. A. SCHOUTEN: “On expansions in series 
of algebraic forms with different sets of variables of different degree.” 268. 
— presents a paper of Prof. J. A. SCHOUTEN and D. J. SrruiK: “On 
n-tuple orthogonal systems of n—l-dimensional manifolds in a general 
manifold of n dimensions.” I. 594. II. 684. 
— presents a paper of Dr. C. B Biezeno: “Graphical determination of 
the moments of transition of an elastically supported, statically undeter- 
minate beam.” I. 621. 
Cat (On Optic “Stellreflexe” in the Dog and in the). 948. 
CELL-INCREASE (The Influence of Light on the) in the Roots of Allium Cepa. 457. 
CHAEROCAMPINAE (The wing-design of). 738. 
Chemistry. H. P. BARENDRECHT: “Urease and the radiation-theory of enzyme- 
action.” III. 29, IV. 126. 
— H. J. Prins: “On the Condensation of Formaldehyde with some Unsa- 
turated Compounds.” 51. 
— A. Smits, G. L. C. La BASTIDE and J. A. VAN DEN ANDEL: “The Pheno- 
menon after Anodic Polarisation.” I. 82, II. 296. 
— A. Smits: “Metals and Non-Metals.” 119. 
— F. GOUDRIAAN: “The zincates of sodium. Equilibriums in the system 
NazO-ZnO-H20.” 179. 
— F. A. H. SCHREINEMAKERS: “In-, mono- and divariant equilibria.” XIX. 
318. XX. 542. 
— H.J. BACKER and J. V. Dugsky: “On the preparation of ¢-sulphopropionic 
acid.” 415. 
— A. W. K. pe Jona: “The trimorphism of allocinnamic acid.” 497. 
— A. W. K. pe Jone: “The Truxiliic Acids.” 509. 
— M. J. Smir: “On some nitro-derivatives of dimethylaniline.” 523. 
— A. J. DEN HOLLANDER and F. E. vAN HAEFTEN: “On the Nitration- 
Products of p-Dichlor-Benzene.” 661. 
— A. Smits: “The Electromotive Behaviour of Aluminium.” I. 876. 
— P.H.J. HOENEN,S.J.: “Pressure- and temperature-coefficients, volume- and 
heat-effects in bivariant systems.” 526. 
— P. H. J. HOENEN, S. J.: „Extension of the law of Braun.” 531. 
— Nit Ratan Duar: “Catalysis.” Part. VII. Notes on Catalysis in hetero- 
geneous systems. 570. 
— Nit Ratan Duar: “Notes on Cobaltammines.” 576. 
