The Meta-Encyclopedia

Briefly noted: P (13)

More than one of these 7 encyclopedias carries each of the following subjects — but every one of them treats it in a sentence or two and then moves on. They are gathered here so the different accounts can sit side by side.

Punjab

Collier's New Encyclopedia: an extensive territory in the N. W. of India, most of it under direct Anglo-Indian authority, and ruled by a lieutenant-governor, a large portion of the remainder constituting the protected state of Kashmir.

Aiton's Encyclopedia: poon-jab', the most northern province of British India. The name is a native word meaning "Five Rivers," having reference to the five great sources of the Indus.

Covered by Collier's New Encyclopedia and Aiton's Encyclopedia

Punka

Collier's New Encyclopedia: or PUNKAH, a large, broad fan, suspended from the ceiling, or a number of such fans, acting simultaneously, and worked by an attendant.

Aiton's Encyclopedia: . See Fan

Covered by Collier's New Encyclopedia and Aiton's Encyclopedia

Purslane

Collier's New Encyclopedia: a plant of the genus Portulaca (P. oleracea), with fleshy succulent leaves, naturalized throughout the warmer parts of the world.

Aiton's Encyclopedia: . See Portulaca

Covered by Collier's New Encyclopedia and Aiton's Encyclopedia

Putty

Aiton's Encyclopedia: a mixture of whiting or carbonate of lime and linseed oil. It is mixed usually to the consistency of dough. To prevent its drying up, it is packed for commercial use in bladders. The glazier uses it to set window panes. He applies the putty with the point of a flexible blade, using considerable pressure. After exposure to the air for a time, it hardens and binds the glass in place. It is used also by the painter to fill inequalities or holes in woodwork before painting. A little paint may be worked in to give it the color of the surrounding surface.

Collier's New Encyclopedia: calcined tin, or oxide of tin and lead mixed in various proportions, used as polishing powder by opticians and lapidaries. In plastering, a fine mortar, nearly all lime, used in stopping crevices of shrinkage. In glazing, a composition of pounded whiting and linseed oil, beaten up into a tough tenacious cement. In pottery, the mixture of ground materials in which in potteries earthenware is dipped for glazing. In foundry work, the mixture of clay and horsedung used in making molds in foundries.

Covered by Aiton's Encyclopedia and Collier's New Encyclopedia

Pyrometer

Collier's New Encyclopedia: a term originally applied to an instrument in the form of a single metallic bar, employed by Muschenbroek about 1730, to indicate temabove the boiling point of merperatures cury, 660° F. It is now applied to any purpose. instrument used for such Tremeschini's pyrometer is founded on the expansion of a thin plate of platinum, heated by a mass of metal previously raised to the temperature of the medium. The Trampler pyrometer is based on the difference in the coefficients of dilatation for iron and graphpyrometer on the difite; the Gauntlet ference of those of iron and fire-clay. The Ducomet pyrometer consists of a series of rings made of alloys which have slightly different melting points. In pyrometers on the Watertype principle, the temperature is determined by noting the amount of heat communicated to a current of water of known temperature which is kept circulating in the medium to be observed.

The Encyclopedia of Founding: An instrument for measuring temperatures beyond the ability of mercury to indicate. The older instruments of this class, such as the Wedgwood, Daniell's, etc., have been superseded by others based on the expansion of gases or on the electrical properties of bodies. Quadrant is the fourth part of the circumference of a circle; an arc of 90 degrees.

Covered by Collier's New Encyclopedia and The Encyclopedia of Founding