The deposits formed by allowing sputtered material to fall on a glass plate, through a fine grating of wires placed close to the plate, are studied in detail. Evidence obtained showing the presence of material in the shadow of the wires and other less direct evidence gives strong support for the view that the sputtered material is able to move about on the surface. It is also shown that when the grating is very fine a considerable fraction of the incident material is not condensed.