Cuar. VUL 
L74 DROSERA ROTUNDIFOLIA. 
CHAPTER VIII. 
Tue Errecrs oF various SALTs AND AcIDS ON THE Leaves. 
Salts of sodium, potassium, and other alkaline, earthy, and metallic 
salts-—-Summary on the action of these salts— Various acids — 
Summary on their action. 
Havine found that the salts of ammonia were so 
powerful, I was led to investigate the action of some 
other salts. It will be convenient, first, to give a list 
of the substances tried (including forty-nine salts and 
two metallic acids), divided into two columns, showing 
those which cause inflection, and those which do not 
do so, or only doubtfully. My experiments were made 
by placing half-minim drops on the discs of leaves, or, 
more commonly, by immersing them in the solutions; 
and sometimes by both methods. A summary of the 
results, with some concluding remarks, will then be 
given. The action of various acids will afterwards be 
described. 
Sauts causinc INFLECTION. SaLts not caustnc INFLECTION. 
(Arranged in Groups according to the Chemical Classification in Watts’ 
‘ Dictionary of Chemistry.’) 
Sodium carbonate, rapid inflec- 
tion. 
Sodium nitrate, rapid inflection. 
Sodium sulphate, moderately 
rapid inflection. fae 
Sodium phosphate, very rapid in- 
flection. 
Sodium citrate, rapid inflection. 
Sodium oxalate, rapid inflection. 
Sodium chloride, moderately rapid 
inflection. 
Potassium carbonate: sluwly pois 
sonous. 
Potassium nitrate: somewhat poi: 
sonous. 
Potassium sulphate. 
Potassium phosphate. 
Potassium citrate. 
Potassium chloride, 
