Abstract: A plug seedling extractor for use with a plurality of variously-sized plug seedling trays is disclosed. The extractor has a base plate assembly with a plurality of extractor pins and an extraction table assembly with a plurality of holes aligned with the extractor pins. A plurality of threaded bolts having lock nuts mate with coupling nuts on the base plate assembly to slidingly connect and vary the height between the extraction table assembly and the base plate assembly. Each of a pair of hand-actuated levers are connected to the extraction table assembly and the base plate assembly on one side to cause relative motion between the extraction table assembly and the base plate assembly. The plug seedling tray slides over the extraction table assembly and is held in position by the cooperation of vertical restraining bars directly over the tray with rear and side alignment bars.

Abstract: This invention concerns a new class of compositions for the sizing of paper and the method of treating paper using such compositions. Such new compositions comprise the reaction products of glyoxal and a hydrophobe which contains at least one hydroxyl group. Such compositions can be used either for internal or surface sizing.