POL] ( 100 ) 



Plywood or Built-up Boards. Terms for a new trade one not 

 possible until powerful " peeling machines " could be pressed 

 into its service. They cover the now ubiquitous " Three- 

 ply-boards," and those of higher number or count. See 

 "Three-ply" and "Multi-ply Boards." 



Pneumatic Apparatus for Wood Refuse. An apparatus consist- 

 ing of an exhaust fan connected by piping with the various 

 machines in a mill, and by exhausting the air in the pipes 

 draws off the chips and shavings with it, which after passing 

 through the fan are blown into a cyclone, where the refuse 

 drops from an opening in the bottom and the air escapes 

 from an opening in the top, 



Pointing. In architecture, the finish given to the mortar-joint 

 in bricklaying, " Towel pointing," ' Tuck pointing," etc. 

 See " Hick-joint pointing." The " raking-out ' of the 

 mortar from between the joints of a stone or brick wall 

 and replacing the same with new mortar. This latter, in 

 new work, is usually termed " tuck pointing," and is carried 

 out with raised joints, made specially prominent in church 

 restorations, where the original plaster, inside or out, is 

 removed and the stone or " rubble- work " is left exposed. 



Points. Small saw teeth are reckoned by the mimber of teeth 

 points to the inch. 



Pole. (1) In forestry a tree from 4 to 12 in. in diameter breast 

 high. A " small pole " is a tree from 4 to 8 in. in diameter 

 breast high. A "large pole," a tree from 8 to 12 in. in 

 diameter breast high. (2) A measure of 5| yds. long 

 or 30 J yds. square. 



Pole-lathe. An early form of lathe worked by a pole under- 

 foot, and a cord wrapped round the wood or object to be 

 turned, the cord attached to a spring pole above on the 

 reciprocative action of the bow-drill ; such lathes are still 

 in use by chair-makers in turning spindles, especially so 

 at their ends. They antedated the rotary foot-lathe of the 

 late eighteenth century. 



Pole-plate. A small kind of wall-plate used in modern roofs 

 to receive the feet of the rafters. 



Pole-wagon. A four-wheeled pair-horse or ox wagon worked 

 with a pole instead of a pair of shafts after the manner cus- 

 tomary with coaches and large or family or state carriages. 



Policy of Insurance or Assurance. A document evidencing a 



contract of " Insurance," which see. 



Poling Boards. Short boards used to line the insides of tunnels 

 during construction, and the sides of trenches for sewer- 



