1905] TRUE & OGLEVEE—TOXIC ACTION OF POISONS II 
In this substance, in concentrations great enough to interfere 
greatly with the growth rate, the presence of the solid seems to bring 
about a slightly increased rate of growth, this effect ceasing as the 
dilution is increased. Here we meet again a compound which is 
tolerated in considerable concentration by the plant (9). 
TABLE VI. 
THYMOL. 
I gram-molecule Growth in 24 hrs. | Growth in 48 hrs. 
JULy 30 
2600 nai Dace Pee ae PR Ad ly cei Bele she o.omm o.omm dead 
BEOG HUCTH a ete e ea eae i ee Ore Sears 4.0 g-omm; 2 dead 
2800 itaseade cass be ee ercteie & bani hgh cme amare oars 14.0 28.omm 
JULY 31 
te Dieta ge SEP O11 8 ule O erode tem rate orate eacnatee ac 2 dead 
ae for nd Siig. Sung Oh axe arp @reeete: pene a eens 350 3 dead 
AUGUST 5 
IS TRE oc toa) divs OAS Sas Boece ca ie epee 2.0 
micion WRG rS Sa arc b5 ea we oa ne cawecet elo, Wes mages I.0 
ERO! URNA ora carla wes date eat ee trees 4.0 
liters BI as. plas ce ev ennatele ee aleetlacts oF 5.0 
Distilled, watets aur ss wren cigsinealg sina eesti L5 
AUGUST 7 
AGO TRUS Ie om orsiianla casero tssve molest sawn e te 52 Be oiF all killed 
20 BTA BANC hid, Peel kon oe ws ea ole ss 3 2.0 all killed 
PBOO- ME CE Sec ee oes Genie rate a cn te) ties Wein etecpiecele; Oks 6:5 all killed 
2800 lite 1 a Barone de lel an ae 7.0 3 living 
Distitled: watétgos. 2 ss ee Pa eee 10.0 
The results with thymol, while not homogeneous, indicate that 
in a concentration of one mol. weight in 2600 liters of solution no 
steady advantage accompanies the presence of the solid. When 
the dilution is somewhat increased, however, such an advantage 
appears. The time at our disposal was too brief to carry out the 
study of this compound or others as far as seems desirable. Never- 
theless, the preponderance of evidence seems to indicate in thymol, 
and less clearly in resorcinol, a favoring effect wis sane! oa the 
presence of the solid (Q). 
DISCUSSION OF RESULTS. 
The general situation developed by the results detailed above 
may with profit be summarized in order to furnish a clear view of 
the facts which are to underlie our further consideration. 
