nv Tiarrl ona} \ 



3.13 



226 PRINXIPLES OF GARDENING. [CH. VII. 



Gloucestershire could be had for 10s. per chaldron, 

 the latter would be no cheaper ; for the heating 

 powers of the first is as 199 to 108 of the latter. 

 In other words, 108 chaldrons of Scotch would 

 afford as much heat as 199 chaldrons of Stafford- 

 shire. 



The following are the quantities of the fuels 

 named, required to heat eight gallons of water, from 

 52'^ to 2 12°: 



lbs. 



Caking coals 1.2 



Splint, or hard coal 

 Cannel coal . 



Cherry, or soft coal 1.5 



Wood of lime 3,10 



beech 3.16 



elm 3.52 



" oak (chips) 4.20 



ash 3.50 



maple 3.00 



" service 3.00 



cherry 3.20 



" fir 3.52 



poplar 3.10 



" hornbeam 3.37 



Peat (average, not compressed) . . 7.6 



Charcoal of w^ood 1-52 



j " peat 3.28 



