ny 
vi. CONTENTS [VOLUME LV 
Paraffin blocks for growing seedlings in — 
culture solutions (with three figures) Conrad Hoffman 
The effect-of certain chlorides singly and cies 
in pairs on the activity of malt diastase - - Lon A. Hawkins 
A physiological and chemical study of after-— 
ripening. Contributions from the Hull Bo- 
tanical Laboratory 170 - - - Sophia Eckerson 
The California Paroselas (with five fapacs) ke S. B. Parish 
The effect of some Puget Sound bog waters on the 
root hairs of Tradescantia— - George B. Rigg 
Toxicity of smoke. Contributions ‘en the Hull 
Botanical Laboratory 171 (with four figures) 
Lee I. Knight and Wm. Crocker 
Western plant studies. I - ~ Aven Nelson and J. Francis Macbride 
Sir Joseph Dalton Hooker - - . F. O. Bower 
The Lichens of Mt. Rose, N a - “Alert W.C. T. Herre 
Toxic inorganic salts and acids as affecting Ane 
growth - - « Chas. 2; le and Frank H. Wilson 
The transpiration of abi leaves infected with 
Gymnosporangium (with one figure) 
oward S. Reed and J. S. Cooley 
Undescribed plants from Guatemala and other 
Central American Republics. XXXVI - - John Donnell Sesith 
Vegetative reproduction in an Ephedra. Contri- 
butions from the Hull Botanical “ecggiaed 
172 (with five figures) W. J. G. Land 
Protoplasmic contractions dosent iccwives 
which are caused of pure distilled water eg 
six figures) - -- W.J.V. Osterhout 
Reproduction by tiseting in the black spruce. 
ontributions from the Hull Botanical Labora- 
tory 173 (with six figures) -  - i oe George D. Fuller 
BRIEFER ARTICLES— 
A simple revolving table for standardizing porous 
cup atmometers (with one ei aigt - G. E. Nichols 
Poisoning by Ginkgo - . - Anna M., Starr 
_ Anew wood-destroying fungus (with six tore} - Adeline Ames 
A safety razor modified for _ hand sections 
(with one figure) - - J. P. Givler 
On Stemonitis nigrescens and related oe - : W. C. Sturgis 
Thomas Howell (with portrait)  - - Huron H. Smith 
The Seeding of Phyllocarpus (with one cs - -T.D.A. Cockerell 
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