Spreading and Adherence of Arsenical Sprays

Historical consideration of spreading -- The theory of spreading -- Sprays that will spread on cabbage leaves -- Sprays that will spread on other leaves -- Conclusion regarding the phenomenon of spreading -- Historical consideration of adherence -- A new theory of adherence -- Electric charge exhibited by the common arsenical preparations -- Electric charge exhibited by the leaf surface -- Preparation of an electrically positive arsenical substance -- Field tests of adherence -- Preparations of positively charged ferric arsenate -- Comparative toxicity of different arsenical preparations -- Conclusion regarding the phenomenon of adherence.