XXVII.] 



CANADA ELM. 



227 



wood for the converter to deal with, the instances of 

 defects being found in opening it, arising either from 

 pruning or from accidental causes, being extremely 

 rare. 



About 2,500 to 3,000 loads of this wood are imported 

 annually into each of the London and Liverpool markets, 

 to meet the wants of private dealers, who employ it for 

 coach-making, turnery, boat-building, &c. The Govern- 

 ment also take about 600 to 700 loads annually for the 

 use of the royal dockyards, stipulating in their contracts 

 that it shall be of the first quality, from 1 1 to 15 inches 

 square, averaging 12^ inches; 20 feet and upwards in 

 length, averaging at least 24 feet in length, and to be 

 well squared, and free from knots. 



The Canada Rock Elm is a remarkably slow-growing 

 tree, the slowest in fact with which we have to deal ; it 

 makes only one inch of wood diameter in about fourteen 

 years.* 



TABLE CX VII. ROCK ELM (CANADA). 

 Transverse Experiments. 



REMARKS. All fractured and crippled, but not completely broken asunder. 



* See Tabular Statement in Chapter II., on the comparative rate of 

 growth of trees, p. 18. 



