220 2IMBER AND TIMBER TREES. [CHAP. 



As Elm timber is best and most durable when worked 

 up soon after the tree is felled, it is not necessary to keep 

 in store more than is required from year to year. If, 

 however, it should be thought desirable to accumulate 

 stock with the view to provide against emergencies, it 

 will be most effectually preserved for future use by 

 keeping it constantly under water, or burying it in mud. 



Table CXIV., showing the transverse strength of this 

 wood, is not so full or satisfactory as could be desired, 

 owing to the difficulty experienced in finding pieces 

 sufficiently straight in the grain for experimental pur- 

 poses. The Tables CXV. and CXVL, showing the tensile 

 and vertical strength, are, however, more reliable. 



TABLE CXIV. ELM (ENGLISH). 



Transverse Experiments. 



