6 BOTANICAL GAZETTE 
TABLE II. 
SILVER NITRATE. 
2 
| 
; 
i 
[JANUARY 
— es 
Growth in 24 hrs. 
Growth in 48 hrs. 
ooo lit 
,000 lit SRNR cel ri gs 2 oc eon deat Wind nono 
h 
250,000 HTLETS.. 2 2. ee ee ee eee ee eee ene 
250,000 liters 
Water, distilled 
Water +sand. 
Oe @ 216s eae ee es ae 6 6 ee ee © 
web) we Oe ee 0 ee Ree 6 8 eK 
S50. ct WE. Sen ee deen hd ati cea eee 
250,000 liters +sand...........-. 6220s eee eee es 
Sa ae ak pecan eo Ot oe) Bw) cy wr ee oe Oe 
ee ee ee a 
AUGUST 14 
ae 
000000 
9.0 
16.0 
(weak seedlings.) 
32.0 
19.0 
A study of the numerical data shows that in four cases out of ten, 
in which the active solutions with and without the solids are com- 
pared, no increased growth rate appears in the magnet of the — 
ilic euler exci vate were with thatcof the on mike ie . 
_ lacking solids. In one case out of ten there is a retardation seen to 
follow the introduction of the solid. If we examine the six cases in - 
which an acceleration followed the introduction of the solid, the sum of © 
the: nieces in asian of the cultures containing the solids is 32". 
_ Thus, seen tk 
te growth ceratoaneten presence 
“of the solids is very marked. Since no ex] 
Se various solids used, we cannot 
li of 
