igoo-i.] Effkcts of Water on Foliage Leaves. 293 



On October 15th, seventy-two hours after the leaves had been placed 

 in the solutions, observations were made upon all the leaves and records 

 taken. 



FeS04 *m/i6, veins blackening generally but in the case of the 

 Dicentra there was a blackening up the centre. 



ZnS04 m/4, Malva dry, Dicentra whitish up the centre, and the 

 others limp with a freckled appearance. 



HgCl2 m/i6, leaves all dead ; salt ascending except in Dicentra, 

 brown from the base outwards along the chief veins. 



CuSOi m/i6, all dead, with the apparent exception of Dicentra, 

 which seems to be living ; Ranunculus is darkened all over ; 

 Malva dried with a deep green margin. 



Ba(N03).2 in/4, Malva crisp from the margin inwards, especially 

 between the chief veins ; Dicentra dry along margin. 



KCl m/2, Malva dried and salt had crept well out along the 

 veins, Dicentra wilting at the margin. 



Na.^COy m/4, Malva dried and discoloured outward from a 

 yellowish green to dark ; Ranunculus darkened on the veins, 

 with the dark colour spreading ; Dicentra dry at the margin. 



HCl m/4, all brownish from the base outward, the region next 

 the margin is green and apparently living. 



HjSOi m/4, similar effect to that produced by HCl, but rather 

 more extensive decolorization, especially so in Ranunculus. 



KOH m/4, dark from the base outward with all the leaves 

 resembling the effect produced by Na-jCO;!. 



NaOH m/4, same effect as KOH. 



NH4NO3, m/2, all slightly wilted, and some have a frozen 

 appearance near the margin. 



NaHCOs ni/4, all wilted dry and Ranunculus darkened. 



NH.OH 5%, all wilted and dead ; Malva very dry. 



* "m" is a solution made by dissolving- the mol. wt. in grams of the substance in a liter of water, 

 thus FeSO^ m/i6 means 152 grams in 16 liters of water. 



