128 BOTANICAL GAZETTE. [ May, 
AN account of some highly interesting experiments ‘On the oe aorta -stream in 
eut branches,’’ by Francis Darwin and R. W. Phillips, is given in Proc, Camb. Phil. Soc. v. 
$30-367 (1886). These experiments were undertaken to help decide between the two theo- 
ries as to the place of the stream of water which supplies the loss by transpiration, viz - 
d-eler 
whether the chief rhe rnebiny path of this stream is in the walls of the woo erm or 
in their cavities. Ther ts favor strongly the latter view. The apparatus used -. — 
for measuring tra ranepiration om so si imple &: nd with prope 
scription of it will b f physiology. It spare of a large T-tube aoe 
in this position b. The n ow horizontal ore is bent up so as to be parallel to the verti! 
scends, t through a rubber stopper, a capillary: (thermometer). eP e eigen 
filled with water hed eas: 
of ed short plece of tnbper ee The severing of al paige and attaching it to the 
unde all such experiments. The apparatus is aes to be 
supported in an upright position with the haan a dipping into a cup of water sup- 
ported on a low block. After a few V allow a bubble a air to 
enter the lower end of the cena Che Pete index bubble must be of equal length in 
all eres and must be allowed to travel to a mark id em. up the tu be before r paral 
ings commence. These ean consist"of the rate at w the 
bea point a teéd tenet * tube, say toits upper end. bt time of travel must be mt 
a stop-watch or other device for — — i 
minute of these times riveas a ney of figures proportional to 
by the branch in a give Particular care must be taken to prevent lesichee at pai 
and stoppers. 
£O ERRERA’S results (Berichte d. deut. bot. Gesell, iv. 16-18 [1886] } from a study of 
ration-stream also militate agai ainst the imbibition theory. _Bi is experime ont is. 
ae . An 
severed 
in the air, another under water, and a third under the just-melted gelatine mass. Th 
pra is then to be quickly pl d int 1d water, and a fresh surface made by removing 
thin slice from the previo eut, Thus the vessels are closed (as can readily be seen) 
ah the black gelatine, ses the walls of the wood- vieen ents - erpeecd to the water. All 
having been placed in water , by measuring: 
the water, t toes shite lone (not Lin the e experiment with Vitis) than even ethe twig 
cutin air, The w rs co] ean, i So be revived, if within half an hour the gelatine~ 
filled portion be ¢ 
A CAREFUL h of the life of John Williamson, botanist and artist, 
M. Kelley, and illustrated with a portrait, several decorative designs, and a 
naif age a hie “tea pote a of his etchings, is given in the Southern Bivouac for 
Marc ch. copottaniy 3.1 to iearn t oe nike of his life, ane presents it in. 
nded, ambitious, 1 
daunted: In spite of most np itions cireumstane Fong achiev eda mene repntation, 
especiall ve ese are suaxocited. avid received the com~ 
mendation of no less an soaker an Philip GGhexs ¢ Hamerton for their artistic excel- 
oe and of many botanists for their scientific aee 
PPROPRIATION BILL for the Department of acne for the year 1836-7, w! 
mmended to Congress by the House committee on on bay Aol a 
tura 
re 
wo! 
pam and Tonenan $1,000. This co covers alla riations in any 
except the salaries of the botanist and tent torene ist. 
