CONTENTS. 
ADAPTATION (Light- and dark-) of a plant cell. 17. 
AGAR-AGAR (On the movement of pepsin in a protein-containing or protein- 
free gel of). 269. 
ALUMINIUM (The electromotive behaviour of). III. 86. 
Anatomy. J. H. ZALMANN: “Concerning an isolated muscle of the ciliary 
body of the pigeon’s eye, situated near the eye-split.” 123. 
— CHR. VAN GELDEREN: “On the development of the sternum in 
reptiles.” 221. 
ANTIGEN (On the formation of heterogenetic) by combination of hapten and 
protein. 237. 
Astronomy. A. PANNEKOEK: “The local starsystem.” 56. 
— W. H. vAN DEN Bos: “The orbit of Bu 6832 = X 1834.” 72. 
— C. H. Hins: “On a change with the declination in the personal 
equation in meridian-observations.” 168. 
AUTOMATIC movements (Regarding) of the isolated iris. 84. 
AVENA (On anti-phototropic curvatures occurring in the coleoptiles of). 177. 
BABINET’S COMPENSATOR (An extension of the theory of). 102. 
— (The optical investigation of surface layers on mercury and a more 
refined method of observation with). 108. 
Birps (Muscle sound in). 78. 
BraAuw (A. H.) and D. TOLLENAAR. Light- and dark-adaptation of a 
plant cell. 17. 
BOEKE (J.) presents a paper of Mr. J. H. ZALMANN: “Concerning an 
isolated muscle of the ciliary body of the pigeon’s eye, situated near 
the eye-split.” 123. 
Boer (S. DE). On the action of the novocain on the tonus of the skeletal 
muscle. 185. 
BOESEKEN (J.), CHR. VAN LOON, DERX and HERMANS. The condition of 
motion of the molecules in space. 198. 
Bork (L.) presents a paper of Mr. CHR. VAN GELDEREN: “On the development 
of the sternum in reptiles.” 221. 
Bos (W. H. vAN DEN). The orbit of Bu 6832 = X 1834. 72. 
BoscHMmaA (H.). On budding and coalescence of buds in fungia fungites 
and fungia actiniformis. 257. 
23 
Proceedings Royal Acad. Amsterdam. Vol. XXIV. 
