1917] FAUST—RESIN SECRETION 471 
way such a test, together with a physiological standardization of 
the products. 
TABLE VI 
"RECORD OF EFFECT OF COLLOIDAL SOLUTION OF RESENE FROM B. sagittata ON PROTO- 
PLASMIC FLOW OF Chara SP, THROUGH UNIT DISTANCE OF 0.465 MM. 
fully weighed in order to understand the problem. 
Time Time flow Time Time flow Time Time flow 
7:15 P.M Io 7:41 P.M 18 3:00 P.M 12 
F107 ae. be) je Brae No record pha Rens ah 13 
CAE & Seer ie) ed Sage ne 12 ys a Daal Ne 14 
Ae ba an age Io rac ORE NCS I2 i eee 15 
7:19. eo aeA ike) FRG as 8 na epee araras 14 
sgh gaa Ten aE aren ya ton aOe ie PAG ue 8 nat) beara ee No record 
PSE Gy co eee EAT ee hiss Io FES aves 1 
Pees Saree shed Cepek ees if mig DER hg vis 10 Grice 13 
vith Cates fee I5 IAG onsen i2 va iy TE Ge 13 
oA Reger ts 15 Piso as I2 Mis = Pao 13 
Fi Be ong 425) 3% 16_ Free ois I4 PEGG) ees 19 
yore |i eee D I4 “alc eee ares 18 na? oe eagle 20 
LAP e aes OF TLS bie aun Rhee kt A ie ne ' COLE Wee cies 15 
ray | er ans Io PiRaAc Lae: 18 fg: + pen es I4 
7 20 Pie 8 Fe BR oe 18 pape ae ve 14 
Tear idiic st 6 PRG rick 22 7 rarer No record 
Bay ace 12 a oy Pap se 23 ig | eee . 
V638 dls 15 fe 28 ST salt ss 18 
Re 12 eT aren eae 22 Sa ss leans No record 
yee, Sees 10 500.4. 255% 18 CEO cas 14 
T2348 eas 8 TOT cya. ilies ds Ma Re Ir 
(i ee eer 15 POP. ws es I2 oe Sa 14 
123505 oe. 8 20 tORe eau 12 Hk Vee aE 12 
Ee Pe ene 17 MBibcicgcexs 12 eee. 15 
oe ee oe 16 BOG. 14 Rea 2 24 
ie 14 See es II a) ey aes co with 
ait 14 Sr 35 es No record death 
TihO eR eas 18 GiOWie. ect 16 
* Resene introduced here. 
Discussion 
A survey of the study of resin secretion makes it evident that the 
problem can be considered logically only in the light of the threefold 
evidence, the ecological, the anatomical, and the physiological. The 
assertion of Tscuircu (loc. cit. p. 1145) that “we shall assuredly 
not arrive at a conclusion by anatomico-microchemical”’ investiga- 
tions is only a half truth. All phases of the problem must be care- 
In this evidence 
the anatomico-microchemical data surely have their place. 
The writer does not claim that the particular solution of resin 
secretion for B. sagittata is a complete solution for resin secretion 
