Mm 
Fig. I. Curves showing the changes of resistance of Laminaria in solutions of various 
sodium salts: ^ in chloride ; i5 in dichromate; C in chlorate; Din formate; Einmolybdate 
(to judge from the points in the figure this might be drawn so as to fall less rapidly toward 
the end, but the form given seems to represent the results better); F in sulphite; G in 
ferrocyanide ; in acid arsenate. Ordinates represent resistance (expressed as percentage 
of the resistance in sea water, which is taken as lOO percent). Abscissae represent time 
in minutes. Each point represents the average of three experiments. Probable error of 
the mean, less than lo percent of the mean. 
