PLUTEUS, a defensive machine, which was used by the ancient Romans. It was composed of wicker hurdles laid for a roof on the top of posts, which the soldiers, who went under it for shelter, bore up with their hands. Kennett, in page 238, of his Roman Antiquities, observes, that some will have them, as well as the vineæ, to have been contrived with a double roof; the first and lower roof of planks, and the upper roof of hurdles, to break the force of any blow, without disordering the machine. The plutei, however, were of a different figure from the vineæ, being shaped like an arched sort of waggon; some having three wheels, so conveniently placed, that the machine would move either way, with equal ease. They were put much to the same use as the musculi. Father Daniel, the Jesuit, in his history of the French militia, makes mention of this machine. He quotes a passage out of a poem, intituled the Siege of Paris, by Abbon, the Monk; the meaning of which is, that the Normans brought up a large quantity of machines, that were called plutei by the Romans, and that seven or eight soldiers could be put under cover beneath them. He further adds, that these machines were covered with bull hides.
The moderns have imitated these plutei by adopting mantelets. The chevalier Folard mentions having seen one at the siege of Phillipeville, of a triangular figure, made of cork, interlaced between two boards, and supported by three wheels that turned upon a pivot.
PLUSH, a kind of stuff with a sort of velvet nap or shag on one side, consisting of a woof of a single woollen thread, and a double warp; the one of two woollen threads twisted, the other goat’s or camel’s hair; though there are plushes entirely of worsted, others of hair, and others again of silk, cotton, &c. White plush breeches have been often worn by dragoons. They resist moisture, and are easily cleaned.
PNEUMATICS. The doctrine of the air, or the laws whereby it is condensed, rarefied, gravitated, &c.
Pneumatic Engine, denotes the air pump.
PNEUMATIQUE, Fr. Pneumatics.
POIDS, Fr. Weights.
Poids de Marc, Fr. Avoirdupois weight.
Poids Romain, Fr. Troy weight.
Poids à peser l’eau, Fr. Waterpoise.