The term "closed package," wherever used in this act, shall mean a basket, box, bag, or other container the contents of which cannot be adequately inspected without opening it except when packaged in packages of less than three pounds net weight or twelve specimen and if fifty per cent of each specimen is visible to the consumer. The terms "shipment" or "ship for sale," wherever used in this act, shall mean movement to market in a railroad car, motor truck, or other medium of transportation, but shall not be construed to include process of delivery to a local warehouse or shipping station.
31 P.S. § 371