414 



FOXWORTHY. 



Table of comparative iceights of eastern woods — Continued. 



Very heavy. 



Heavy. 



Moderately heavy. 



Light. 



Bp. gr., 0.90 <>r more: 



900 Kilos or more 

 per M :t : . r iti lbs. or 



more per en, ft. 



Sp. gr.. 0.70-0.90:700- 

 900 kilos per M 3 : 44- 

 M lbs. per on. It. 



Sp.gr.. 0.50-0.70: 500- 

 700 kilos per M ': 81 

 44 lbs. per en. ft. 



Sp. gr., 0.50 or less: B00 kilos 

 or less per M*: SI lbs. or 

 less per en. ft. 



Moku.o 



Kolavu.» 



Mango. 1 



Hcrnandia peltata, 



Culis. » 



l.Hiiotan. 



Mayapis. 





Khnir. • 



Leban. '■ 



Nam. 





Longan. 1 



Mahogany. • 



Nato. 





<'allgll." 



Mamasin. 



Nangka.' 





Thitya.* 



Maagachapny, 



Palo marla. 





Talon.* 



Molave, 



I'ili. 





Thitsi." 



Neuiin." 



Mahogany. " 







Nireh. >• 



Renghaa.' 







Padauk.* 



Sacat. 







Pagatpat 



Santol. 







l'etir. 



Tiilisay. 







Kassnk. 



Tamayuan. 







Sal." 



Tangnile. 







f'iagao. >> 



Teak. 







Siris." 



T< tog. ' 







Blnoo. * 



Thinkadn. :l 







Supa. 



Silky oak." 







Timlalo. 



Kumpas. 







Tbingan. " 









Trineomali. ■ 









'l'ucaii-ealao. 









[Tbai 







■ These woods are placed according to their arrangement in Gamble, J. c. 

 b These woods are placed according to information given in Van Eeden, /. c. 



Hardness. — It is niucli more difficult to get a satisfactory measure of 

 hardness than it is to get the weight. No completely satisfactory method 

 of determining relative hardness has come to my notice. There are, 

 however, certain comparative values recognized and these 1 have en- 

 deavored to show in the following very imperfect table. 1 have been able 

 to use only five categories, viz, very hard, hard, moderately hard, soft and 

 wry soft. Those woods classified by Gamble as extremely hard and 

 extremely soft will naturally come under the very hard and very soft 

 classifications in this table. 



Many of the very hard and very heavy woods are very dark in color. 

 In these cases the sapwood is usually very much lighter in color and 

 weight, and is softer. In these woods it is the deposit of the dark-colored 

 substance in the wood elements when the sapwood changes in heart wood 

 'that causes the hardness and weight, This is, of course, not the sole 

 cause. There are some woods where the sap and heart are not noticeably 

 different in color. In these cases, there is very little difference in weight 

 and hardness in the different parts of the tree. If such woods are heavy, 

 it will usually be found to be due to the thickness of walls of the fibers 

 and the close crowding together of the wood elements. This is the 

 case in agoho and in boxwood. 



