94 THE JOURNAL OF BOTANY 
this is the particular experiment we wish to scree gs 
Bose describes a new mode of demonstratin, sec The 
siepibltnank is as follows :—A Colocasia plant, lifted from a mata 
soil, was placed in water in order to remove the earth from the 
roots. It was kept:overnight with its roots in normal saline 
solution, which he. states was slowly absorbed. In the apes 
the plant was washed to remove the salt. A young root was now 
immersed in dilute silver nitrate. On passing tentanising pl 
through the plant, the immersed root became excited and secreted 
its contained salt solution, this being seen in the aver nitrate as 
streams of white ati ate. 
is may admirable mode of demonstrating root- 
secretion, but bate we adopt it for class or other purposes, we 
require to know: (1) What happened to the root-hairs when they 
were placed in water? Did they burst? (2) What happened to 
the root-hairs when they were transferred to normal saline ? 
(3) Does ee normally contain any appreciable quantity of 
e? 
sodium chlo 4) Are not the ¢ of the root killed by 
dilute rics nitrate? (5) Would the same result have been ob- 
tained i ots had not been put previously in normal sali 
chee that the experiment cannot bear the weight of the 
io 
eteithaldes we welcome Professor pee 8 aces: and commend 
it heartily to the critical, to those who arch of subjects 
for investigation, and to all who can appreciate ; delightful nest 
displayed in devising methods and in designing appara The 
orm, t, and illustrations of the book are worthy of the high 
reputation of the publishers. 
FREDERICK KEEBLE. 
ee enn rep 
BOOK-NOTES, NEWS, ¢e. 
At the mgm 3 of the Linnean aoa on 6th February, 1908, 
a@ paper w by Mr. Clement Reid “Fruits and Seeds 
from the ee ieee Beds of Britain and the Netherlands,’’ espe- 
cially on the Pakefield specimens from the neighbourhood of 
Lowestoft (Cromer Forest-bed), and from Tegelen, near Venloo, in 
ths province of Limburg, Netherlands. The substance of his 
observations me been published in the Verhandelingen of the 
rd mages rae 
- her 
to the centre of the province of Fokien. The difficult journey 
from Foochoo to Yenping was successfully accomplished, and 
