Vol.XXIII 
JANUARY 20. 1823 
No. 3 
/.;■': ; r v ■ ■ » 'contents ;■ 
A Cytolbgical Study of rlnfection of Baart ansf Kanred 
■ Wheats hiy Pucciniagramlnis tritici 
1 RUTH F« ALLEN • 
C > . ' V 1 (Ccrntribution from Bureau ol Plant Industry and California . 
> ~ ' s . AgfifijIHifai SteHon) _ * 
After-Ripening and Germination of Apple Seeds - r 
- GEORGE T. HARRINGTON and BERTHA C. HITE , 
1 ‘ . % , - , ' (Cealnbtttioja feast Bureau ot Plant Industry) ' ■ - 
Miscellaneous Tests of Carbon Tetracblorid as an Anthel- 
mintic • , • ‘ ' •' * . 
/ . /■ '/ MAURICE C. HALL ATO> JACOB E. SHILLINGER 
: j - ' V • .. '' (Contribution from Bureau of Plant lndus'ry) 
.Structure, Physical Characteristics, and ■ Composition of 1 
the Pericarp and integument of Johnson Grass Seed in 
Relation to its Physiology - - , - - 
GEORGE T. HARRINGTON and WILLIAM CROCKER 
* , ' (Contribution from Bureau of Plant Industry) 
P«g# 
131 
153 
153 
193 
Probable Cause of the Toxicity of the So-Called Poisonous 
,,Greensand -- ' '» t--,.' -« s - - - ~ ’ ,223 
; ’ " -/ .V J. W. KELLY ' , _ ; . . 
■ , < Contribution (tom Bureau ol Plant Industry) 
PUBLISHED BY AUTHORITY, OR THE SECRETARY OF AGRICULTURE, 
. ' •" - WITH THE COOPERATION OF THE ASSOCIATION - '/ ; * 
\ y.' '• OF LAND-GRANT COLLEGES *; " *- . ''' v.\ ; 
, WASHINGTON, D. C. 
GOVERNMENT PRINTING OFFICE 
j' , \ ' 1 1923- '■ v 
