The extraction of As(III) and Ge(IV) from hydrochloric acid solutions by several solvents has been measured. The distribution ratios generally increase in a regular manner as the acid concentration is varied from 2 to 12 F. Differences in extractive power between the solvents carbon tetrachloride, chloroform, bis-(2-chloroethyl) ether and benzene are relatively small. Isopropyl ether shows a maximum in extraction between 7 and 8 F hydrochloric acid for As(III) accompanied by a sharp rise in the solubility of ether in the acid phase as has been observed in the extraction of other elements with this ether.As(III) in hydriodic acid, shows a similar maximum with the solvents used but without the increased phase miscibility.This maximum appears to be related to a change in the nature of the aqueous phase species since the maximum corresponds to a minimum in the solubility of Asli in hydriodic acid.