I think it really is the plate you want. The text in my copy is "Loading-tongs, Fig. 202, Pl. 27, for placing in the charge and shell of 8 -inch
siege-howitzers, are formed of two arms so hinged together, that the bent ends of the short
arms will enter the ears of the shell, and the grooved and widened ends of the long ones will clasp between them the cartridge. The implement is made of such a length, that the
cartridge can be thrust into the chamber by reaching in one hand, holding the tongs with the
cartridge in position." Of course, my copy was published in 1863.