PHOSPHORIC a.
ric acid. (Chem.) (a) Metaphosphoric acid in the form of glassy semitransparent masses or sticks. (b) Pure normal phosphoric acid. -- Phosphoric acid (Chem.), a white crystalline substance, H3PO4, which is the most highly oxidized acid of phosphorus, and forms an important and extensive series of compounds, viz., the…
PITCH n.
A thick, black, lustrous, and sticky substance obtained by boiling down tar. It is used in calking the seams of ships; also in coating rope, canvas, wood, ironwork, etc., to preserve them. He that toucheth pitch shall be defiled therewith. Ecclus. xiii. 1.
POLE n.
A measuring stick; also, a measure of length equal to 5 Bacon. Pole bean (Bot.), any kind of bean which is customarily trained on poles, as the scarlet runner or the Lima bean. -- Pole flounder (Zoöl.), a large deep-water flounder (Glyptocephalus cynoglossus), native of the northern coasts of Europe and America, and m…
PROOF a.
- Proof staff, a straight-edge used by millers to test the flatness of a stone. -- Proof stick (Sugar Manuf.), a rod in the side of a vacuum pan, for testing the consistency of the sirup. -- Proof text, a passage of Scripture used to prove a doctrine. proof coin or proof, a coin which has been specially struck, to pr…
RACK n.
g, a lashing or binding where the rope is tightened, and held tight by the use of a small stick of wood twisted around. -- Rack rail (Railroads), a toothed rack, laid as a rail, to afford a hold for teeth on the driving wheel of locomotive for climbing steep gradients, as in ascending a mountain. -- Rack saw, a saw h…