15° BOTANICAL GAZETTE [AUGUST 
tatory reaction which drives water in one direction.? But some of his reasoning ~ 
is radically defective, the chapters are full of assumptions, and his experiments 
are inconclusive. Indeed, he hardly seems to know how difficult a problem he 
is attacking, and he goes at it with the naiveté of a novice. Such work really 
tends to prejudice one against the whole book; and caution is necessary, for 
there are other weak spots. In spite of these, the suggestiveness, the ingenuity, 
and the enormous labor displayed impel us to give this a most cordial 
reception. And we shall await with much interest a promised volume on the 
electrophysiology of plants.—C. R. B. 
MINOR NOTICES. 
N. Am. Uredineae.—The second: part of Hotway’s photomicrographs of 
plant rusts has just appeared, having been delayed several months by a printer's 
strike. The general character and purpose of this publication were described 
in this journal*+ upon the appearance of the first part. The present part con- 
tinues the genus Puccinia through eleven host families, ending with Rosaceae. 
The photogravure plates carry out fully the promise of the first part—J. M. C. 
Schneider’s Handbuch.—The fifth part of the Jllustriertes Handbuch der 
Laubholzkunde’ concludes Drupaceae and includes Pomaceae, and ends the first 
volume. There are 128 text figures, and a volume index of genera.—J. M. © 
NOTES FOR STUDENTS. 
The ascent of water.—After GopDLEWSKI’s interesting theory of the relay- 
pump action of the medullary rays in lifting water seemed to have been completely 
overthrown by STRASBURGER,® who found water still ascending for weeks after 
treatment calculated to kill living cells, the participation of living cells in lifting 
water found a champion on theoretical grounds in SCHWENDENER.? But Ever. 
FERS hardly dared more than to suggest that they might be. of importance 
2 See in this connection reviews of other recent papers below. 
3 Hotway, E. W. D., North American Uredineae, Vol. I. part II. 4to. pp- ie 
pls. 11-23. Minneapolis, 1906. $2.00. 
4 Bor. GAZETTE 40:459. 1905. 
5 SCHNEIDER, CAMILLO Kart, Illustriertes Handbuch der Laubholzkunde- 
Fiinfte Lieferung. Jena: Gustav Fischer. 1906. M 
6 STRASBURGER, E., Ueber den Bau und die Verrichtungen der Leitungsbahnes 
in den Pflanzen. Histologische Beitrige 3. Jena, 1891. Ueber das Saftsteige”- 
Histologische Beitrage 5. Jena, 1893. _ 
7 SCHWENDENER, S., Zur Kritik der neuesten Untersuchungen iiber das Saftsteige™- 
Sitzb. Berliner Akad. 44:911-946. 1892. Gesammelte Unters. 1: 256-297- Raoett® 
Ausfiihrungen iiber die durch Saugung bewirkte Wasserbewegung in der Jamin — 
Ketten. Sitzb. Berliner Akad. 45:835-846. 1893. Gesammelte Unters. 7° 
15- 1898 
8 PreFFER, W., Pflanzenphysiologie 1: 203. 1897. 
