Unit Measures Photosynthetic Rate and Stomatal Resistance.  Simple Filter/Storage System is Sterile and Disposable.  Automated Microplate Washer Offers Choice of Cycles.  Soil Enhancer Combines Microbes and Catalyst.  Plastic Bags for Storing Baled Hay in the Field.  Photometer Reads Samples through Microplate Wells.  Cell Culture Vessel Allows Interchange of Surfaces.  Protectant, Systemic Actions Combined in Seed Treatment.  Five New pH Meters for Use in the Laboratory or Field.  Stainless-steel Sprayer for Professional User. Plant Dis. 68:358. Copyright 1984 American Phytopathological Society. DOI: 10.1094/PD-68-358.