Feb. 1903.] BOTANICAL SOCIETY OF EDINBURGH 337 



of all Other congeners, amounting to as much as 500 oz. 

 or 312 per cent., as shown in the following table of 

 yields obtained by Mr. Bosisto : — 



Per 1000 Ih. of Leaves, Stedklets, and Branches. 



It is mainly on account of this large yield of febrifugal 

 properties that many give preference to the peppermint 

 gum for plantations in any paludal fever region, its only 

 drawback being that it does not grow so rapidly as the 

 blue gum, nor does it so readily accommodate itself to 

 diversity of soils. It is hardier, however, and it has been 

 known to grow to a height of 60 ft. in nine years. 



Eucah/ptus viininalis (white gum, manna tree). — In 

 favourable situations of deep forest glens this tree rises to 

 a very great height. One measured by Mr. D. Boyle was 

 found to be 320 ft. high, and had a stem base 17 ft. in 

 diameter. The timber varies from light to dull brick 

 colour ; that from straight stems is employed for shingles, 

 rails, and also rough building material. It is not so 

 durable as the wood of some other kinds of Eucalypts, but 

 is stronger than that of K amygclalina and E. ohliqua. 

 Boards half an inch thick, sawn from the tall-stemmed smooth 

 varieties grown in moist forest glens, were i'ound to last 

 twice as long as pine boards one inch thick. The stems of 

 this variety are of an almost uniform thickness up to a 

 great height, and mast-like in straightness. When so 

 chosen, the wood is pale and compact, and does not warp. 

 The smaller branching trees on open ridges and plains are 

 noted for exuding a sugary substance called manna, which 

 is considered a great luxury. 



Eucalyptus sicheriana (white gum-topped stringy bark). 

 — This valuable tree, attaining a height of 200 ft. or 

 more, is common in the alpine and sub-alpine habitats. 

 The trunk is sawn into good timber, and is also used for 

 posts and rails ; the wood is recommended for timbering 



