Work Output of Rats Subjected to Continuous Faradic Stimulation.

(1) Arsenic fungi are more numerous than was previously supposed. Some saprophytic species common in the soil are active in the production of arsenical gases. (2) Arsenic tolerant forms include many species which do not decompose arsenic compounds with the evolution of gases. (3) Arsenical substances carried to the soil come in contact with decomposing agents, which tend to break them into volatile or quickly soluble forms. Accumulation of arsenic in the soil may be expected to occur only when massive amounts are used or under special conditions unfavorable to the development of a varied microflora. (4) The disintegration of arsenical compounds may be caused by a considerable variety of fungi. Presumably, therefore, it is of sufficiently common occurrence to warrant the avoidance of arsenical preservatives for materials to be utilized in enclosed areas.