CONTENTS. Til 
BOEKE (J.) presents a paper of Mrs. C. KE. DROOGLEBVER FORTUYN-VAN LEIDEN : 
“Some observations on periodic nuclear division in. the cat’. 38, 
— presents a paper of Dr. H. C. Detsman: “The gastrulation of Rana esculenta 
and of Rana fusca”. 906. 
— presents a paper of Mrs. C, E. DROOGLEEVER FoRTUYN-VAN LEIDEN : “On an, 
eel, having its left eye in the lower jaw”. 1120. 
— presents a paper of Dr. H. C. DersMaN: “On the relation of the anus to the 
blastopore and on the origin of the tail in vertebrates”. 1256. 
BOER (s. DE). On the structure and overlap of the dermatomes of the hindleg 
with the cat. 321. 
— Contribution to the knowledge of the influence of digitalis on the frog’s heart. 
Spontaneous and experimental variations of the rhythm, 1029. 
BOESEKEN (J.) presents a paper of Prof. W. Reinpers: “The system iron-carbon- 
oxygen”. 175. 
— presents a paper of Prof. W. RernpeErs: “Birefractive colloidal solutions”. 189. 
— presents a paper of Dr. H. I. WATERMAN : “Metabolism of Aspergillus niger”. 215. 
— presents a paper of Dr. H. I. Waterman: “Amygdalin as nutriment for Asper- 
gillus niger”. 922. II. 987. 
— presents a paper of Prof. W. ReinpErs and L. HAMBURGER: ‘“Ultramicroscopic 
investigation of very thin metal and saltfilms obtained by evaporation in high, 
vacuum’. 958. 
BOHR and DeBYe (Note on the model of the hydrogen-molecule of). 480. 
Botany. Miss E. Tauma: “The influence of temperature on the growth of the roots of 
Lepidium sativum’. 61. 
— J. A. Hontye: “Variability of segregation in the hybrid”, 805. 
— U. P. van AMEYDEN: “The influence of light- and gravitational stimuli on the 
seedlings of Avena sativa, when free oxygen is wholly or partially removed”. 1165, 
BRINKMAN (R.) and H. J. HAMBURGER. Experimental researches on the perme- 
ability of the kidneys to glucose. I. 989. If. 997. 
BROUWER (E.). Researches on the function of the sinus venosus of the frog’s 
heart. 455. 
BROUWER (H. A.). On the tectonics of the eastern Moluccas. 242. 
BROUWER (L, BE. J.) presents a paper of Dr. H. B, A. BockwinkEL: “Some consi- 
derations on complete transmutation”. I. 856. II. 1100. 
BROWNIAN movement (Experimental inquiry into the laws of the) in a gas. 1006, 
BRUYN (C. A. LOBRY DE) and A. Smits. A new method for the passification of 
iron. 880. 
BUCHNER (E. H.) and Apa Prins. Vapour pressures in the system: carbon disul- 
phide-methylalcohol. 1232. 
BURGERS (J. M.). Note on the mode! of the hydrogen-molecule of Bour and 
DesiseE. 480. 
— Note on P. ScHERRER’s calculation of the entropy-constant. 546. 
BURLET (H. M. DE) and J. J. J. Koster. On the determination of the position of 
the macula-planes and the planes of the semicircular canals in the cranium, 49. 
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