A short article describing the lanameter, a portable device for judging the fineness of wool fibers. A microscope projects the fiber at 60x for comparison with standards, or at 500x for individual measurements on a scaled disc, and the image can also be photographed for a permanent record. The article explains the construction of the apparatus, its wooden carrying case, slides, lighting and objectives, and how wool growers, dealers and mill men can use it. Photographs show the apparatus and its components.