Dry pile

Dry pile Ritter was the first who constructed piles of galvanic cells with dry separators, e.g., of leather. The function of these piles is based on the small amounts of humidity in these separators. 

Electrochemical pile — Historic name for a - battery with a series of -> electrochemical cells arranged in form of a pile. The name has been also used for other multicell arrangements. See also - Carre pile, - Cruikshank pile, -> dry pile, -> Grenet-farriantpile, -> Muirhead pile,... 

Zamboni pile — This was a dry pile consisting of tin foil on paper and layers of manganese dioxide. The latter was transferred as a paste onto the paper side of the silver paper, and many layers were combined to a so-called dry pile, i.e., only having a wet layer of the manganese dioxide. Other combinations were tin foil-paper-brass foil (or copper-foil). 

There is a possibility to plan for greenhouse space between the outside of the tree drying pile and the dome walls, pending consideration of safety issues, The greenhouse area available in the drying dome is up to 9300 m ... 

To charge the electroscope, the rod is pushed down close to the disperser, and Zambom s dry pile brought up to it and then removed after charging, that is, when the aluminium leaves of the electroscope... 

The spontaneons combnstion of coal is believed to center around the basic concept of the oxidation of carbon to carbon dioxide. This particular reaction is exothermic (h-94 kcal/mol) and will be self-perpetnating especially since the rates of organic chemical reactions nsnally donble for every 10°C (18°F) rise in temperature. Furthermore, there has also been the snggestion that the heat release that accompanies the wetting of dried (or partially dried) coal may be a significant contribn-tory factor in the onset of bnrning. Support for such a concept is derived from the observations that stored coal tends to heat np when exposed to rain after a sunny period (dnring which the coal has been allowed to dry) or when wet coal is placed on a dry pile (Berkowitz and Schein, 1951). 

The so-called dry pile was invented by Ritter but its usual form was evolved by Marechaux, B. Behrens, De Luc, and especially Guiseppe Zamboni (1776-1846), professor of physics in the Lyceum in Verona. G. J. Singer constructed a dry pile of 20,000 zinc and silver pairs separated by... 

De Luc s work on electricity is perhaps his best it includes the invention of the dry pile , afterwards improved by Zamboni, etc. (see Vol. IV). He had a confused theory that rain is produced by the action of electricity on a mixture of hydrogen and oxygen in the atmosphere. ... 

Thus, the dry pile temperature coefficients are Important in the following discussion. 

The dry pile Doppler coefficient has been measured over a temperature range of 20 - 968 C (See Appendix III, Volume II). The total Doppler defect to uranium melting based on these measurements Is 3 7 k extrapolated to zirconium melting the defect Is 5 3 k. 

Most of the textured apparel and industrial yams are woven or knitted directly into fabric. The carpet BCF yams can be tufted directly off package into loop pile or velvet constmctions. For the textured saxony constmctions, the BCF and the spun staple yams must be ply-twisted and heat-set. The heat-setting temperature for nylon-6 and nylon-6,6 is 180—220°C in hot—dry atmosphere, and 120—140°C in saturated steam. The yams are twist-set in pressurized autoclaves or continuously on the Superba and Suesson machines (121). Before setting the twist, the yam is heated and relaxed for predevelopment of the bulk. 

Foi example, nylon pile fabrics, exhibiting higher moisture regain, have different traction characteristics under wet and dry conditions than do polypropylene-based materials. Effects of artificial turf fabric constmction on shoe traction ate given in Table 2. Especially effective in aiding fabric surface uniformity is texturing of the pile ribbon, a process available for the two principal pile materials nylon and polypropylene. 

Production and consumption of wood products and residues are measured ia various units, based on common usage and their metric equivalents (2—4). Pulpwood logs and fuelwood are commonly measured ia cords. A cord refers to a stacked pile of wood, with outside dimensions of 4 by 4 by 8 ft (1.22 by 1.22 by 2.44 m) and a volume of 128 ft (3.62 m ). The weight of a cord depends on density of wood and bark and on moisture content. In the United States, it can range from 1.3 to 1.7 short tons (1.2 to 1.5 metric tons), air dried. 

Dust content In hot, dry climates the opposite problem occurs. Water evaporates, and the dust and fine particles may blow away, causing pollution and a nuisance hazard. This fugitive dust is controlled by spraying the fuel pile with water containing a polymeric dust binder that physically holds the particles together. 

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