23 PNEUMATIC MACHINES AND APPARATUS FOR HANDLING DRY BULK MATERIALS SUCH AS LIME, ROCKDUST, CEMENT, MAGNETITE, MINE SEALANTS, SAND AND THE LIKE INCLUDING STORAGE BINS, TRANSFER AND LOADING APPARATUS, CARRIERS, HAULERS, PIPELINES, FEEDERS, ROCKDUSTERS, FLUIDIZERS, MIXERS, DISPENSERS AND APPLICATORS SOLD AS A UNIT