Spring-tooth rake, [138], [400]
Stabler, Sydney S., donor, [32], [33], [68]
Starks, Niels O., [43]
Starter, tractor, [124]
Statistical Reporting Service, U. S. Department of Agriculture, donor, [380], [381]
Steam engines, [164], [254], [341], [384]
Sterilizer, milk, [260]
Stout, Mrs. Emery L., donor, [374]
Stover, Daniel C., [317]