100 lbs. of turfy, air-dry peat, on the average = 95 lbs. of pine wood. " fibrous " " " = 108 " " " earthy " " " = 104 " " " pitchy " " " = 111 " " The comparison of heating power by bulk, instead of weight, is as follows:-- 100 cubic ft. of turfy peat, on the average[12] = 33 cubic ft. of pine wood, in sticks. " " fibrous " " = 90 cubic ft. of pine wood, in sticks. " " earthy " " = 145 cubic ft. of pine wood, in sticks. " " pitchy " " = 184 cubic ft. of pine wood, in sticks. According to Brix, the weight per English cord and relative heating effect of several air-dry peats--the heating power of an equal bulk of oak wood being taken at 100 as a standard--are as follows, _bulk for bulk_:[13] _Weight per _Heating cord._ effect._ Oak wood 4150 lbs. 100 Peat from Linum, 1st quality, dense and pitchy 3400 " 70 " " 2d " fibrous 2900 " 55 " " 3d " turfy 2270 " 53 Peat from Buechsenfeld, 1st quality, pitchy, very hard and heavy 3400 lbs. 74 Peat from Buechsenfeld, 2d quality 2730 " 64 These statements agree in showing, that, while weight for weight, the ordinary qualities of peat do not differ much from wood in heating power; the heating effect of _equal bulks_ of this fuel, as found in commerce, may vary extremely, ranging from one-half to three quarters that of oak wood. Condensed peat may be prepared by machinery, which will weigh more than hard wood, bulk for bulk, and whose heating power will therefore exceed that of wood. Gysser gives the following comparisons of a good peat with various German woods and charcoals, equal weights being employed, and split beech wood, air-dry, assumed as the standard.[14]