HANS Dal 
To a man however of his ardent temperament it could never suffice 
that he himself should see and know what he believed to be the truth. 
The faith that was in him — and to Weuvonx his work was in a very 
real sense a religion — that faith be fervently desired to instil into the 
breasts of others; and of his colleagues and pupils not a few have learnt 
his methods and are following in his steps. He had begun to form, 
in fact, a school. At the same time he hoped to secure a wider pub-. 
lieity for his views by the journal, Biometrika, which in 1901 be founded 
in association with Francıs Gatton and KARL Pearson; in this he was 
certainly not disappointed. 
That a career so full of promise should have been so untimely 
cut short must cause keen regret to every scientifie man. To the inner 
eircle of his acquaintances and friends, his colleagues and pupils it is 
a matter for still deeper sorrow; for they knew him not merely as a bio- 
metrician but as a zoologist with a wide knowledge of animal structure 
and function, not merely as an enthusiastic and devoted researcher but 
as a teacher who could kindle the sacred flame in his hearers, above 
all perhaps as one who — nullius edoctus jurare in verba 
magistri — stood sturdily for progress and reform. 
But through his death must leave a gap which it will be hard 
to fill his mantle may yet full upon worthy shoulders, for on all who 
came under his influence he set the seal of his own strength of pur- 
pose and nobility of aspiration. In them his spirit will survive and they 
assuredly will not let his memory fade. 
Dr. Henrryson, Mus. of Compar. Anat., Oxford. 
Nachdruck verboten. 
Une petite notice sur la vacuolisation des cellules nerveuses. 
Par Dr. Em. Mencu, Prague. 
Dans ma notice sur les cellules nerveuses j’ai fait mention de ce 
quil faut distinguer deux especes de vacuoles dans les cellules ner- 
veuses: les unes, qui contiennent une matiere limpide, grandes et 
menant a le déstruction de la cellule, et les autres, qui contiennent le 
lymphocyte, et sont proprement dit la coupe du canal, par lequel le 
lymphocyte pénétre dans le noyau. — Dans ce deuxieme cas, il est 
difficile de saisir le sort suivant de la cellule. Tandis que les vacuoles 
de l’espece premiere s’elargissent tant qu’elles repoussent tout le proto- 
plasme, dans le reste du quel on peut voir souvent le noyau a demi 
dissocié ou quand méme seulement des traces de celui-ci, les vacuoles 
de l’autre origine ne s’agrandissent pas de maniere frappante, mais se 
bornent 4 un petit cercle autour du lymphocyte se mouvaut. 
Apres avoir pénetré dans le noyau, le lymphocyte s’y établit et 
détruit tout le chromatine. Mais jamais ou ne peut observer sur les 
préparations du lobe électrique de la torpille, ou cette ,neuronophagie“ 
se montre, la dissociation totale des cellules mémes, ce qui est une ap- 
parition trés difficile 4 expliquer. 
