PROPERTIES OF WOOD. 



heartwood yellowish-brown. There are some microscopic 

 differences between the above-mentioned woods. 



33. Woods of the family Cupressineae (Genera, Chamaecyparis, 

 Cnpressus, Thuya, Libocedras, Juniperus, etc.). 



There are no resin-ducts, and these woods are difficult to 

 distinguish from those of the former groups ; the finer tissues, 

 especially in the summer-wood, and their characteristic scent, 



as well as differences in 

 colour, afford a few not 

 very trustworthy characters. 

 Microscopic examination is 

 also unsatisfactory. 



Lawson's Cypress 

 (Chamaecyparis Laicsoni- 

 fnia) has a broad sapwood, 

 ?/] a P a ^ e reddish heartwood, 

 slightly differentiated from 

 the sapwood, a character- 

 istic scent. Cham, obtusa 

 (Japanese) has a rose- 

 coloured or reddish heart- 

 I I wood and a characteristic 



scent ; Cham. pisifera 

 (Japanese), a yellow heart- 

 wood; Thuya plicata, a 



Fig. 27. Type of Palmwood. 



heartwood is almost identical 



brownish-grey heartwood 

 in Thuya occidentalis the 

 with the sapwood ; Juni- 



perus virginiana and J. bermudiana, Pencil-cedar, a narrow 

 sapwood, the heartwood being bright cherry-red and becoming 

 later yellowish-brown, with a pleasant cedar-like scent 

 (Fig. 26). 



(C) Palmwoods. 



34. Woods of the genera Areca, Arenga, Borassus, Cocos, 

 Corypha, Lirtatuiia, Sabal, <'(<-. 



Transverse Section. Vascular bundles with thick dark 

 brown or black wood, that is very hard near the periphery of 



