The Bridgeport evening farmer., 1914-12-26
TTTE: FUEL VALUE OF WOOD

The fuel value Of fwro poA7nds or wood is roughly equivalent to that as the resuIt of certain calculations now being made in the forest service la1bratory which show also about how n,axfv cords Of certain kinds of wood E are reuuiFed to obtain an amount or hesst equal to that in .. ton of coal
 Certain kinds of wood. such as hick-1 ory oak, beach birch hard nfaples ash elm, locust, Io1sleaf pine. and cherry. have fairly high heat values and only one cord of seasoned wood Of these species is required to equal one ton Of good coal.
 Ik takes a cord and a half of short 1ezf pine shenn1ock, red gum. Douglas fir. sycamore, and soft maple to equal "a ion of coal, and two cords of cedar, redwood poplar, cataapa. Norway pine, cypress, basswoods spruce and white pine
 woods, however. are said to- have practically the same heat yalue re- gaxdIees Of species, and as conse- aneaace 1t can be stated as general propoafzdon that the heavier the wood tha more heat to tho cord Weight for weight, however there is very IEzt1e difference between various spec aee. the average heat for all that have been calculated s 4.600 oalories. or head 51ntta, per kf1ogrann. A kilogram Of resin will develop 9,400 heat units. or about twice the average for wood. As a scOnsequences resinous woods Lave a greater heat value per pound than 1aor-resl nous woods, and this in creased value varies, Of course, with ttn6 resin content
 The available heat value of a cord Of wood depends on many different factora It has relation not only to the amount of resin st contains but fo the amount of moisture present Eas1r4her1nore cords vary as to the axnouzDt of solid wood they contain even when they are of the standard I dimension and occupy 12S cubic feet t of space A certain proportion of this space is made up of air spaces between the sticks. and this air space may be consIderaEle in a. cord made 5 of twisted, crooked. and knotty sticks Out Of the 12s cubic feet a. fair aver age of solid wood is about so cubic
 It is pointed out however, that heat value -fs not the only test of useful ness in fuel wood and since 95 per cent Of all wood used for fuel is con- sumed for domestic purposes, largely in farm houses, such factors as rapid are imp ortant. Each section of the country has it's favored woods and ! these are said to be, in general, the i right ones to use. Hicory, of the non woods. has the highest fuel value per unit volume of wood. and has other advantages. It burns evenly. and, as housewives say, holds the heat. The oaks come next. followed by beach. birch. and maple. Pine has a rela- lively low heat value per unit volume, but has other fine advantages It ignites readily and gives out quick hot flame, but one that soon dies down This makes it a fayorite with rural housekeepers as a summer wood, because it is particularly adapted for hot days in the kitchen.
 The fuel qualities of chestnut adapt 1t particularly to work in brass foun- dries. wher it gives just the required amount of heat and t is therefore in favor. Coastwise vessels in Florida pay twice as much for Florida but tonwood as for any other. because it burns with an even heat and with a minimum amount of stnoe and ash.
 The principal dIsadvantage Of the fresInous pines is their oily black