417 



Assistance and technical advice as to suitable species and known 

 habits of these should be obtained from the College of Hawaii 

 botanist who is also the consulting botanist of the Division of 

 Forestry. 



//. The Prevention of Sand or Dust Drifting. 



Prepare a list of both indigenous and introduced tropical and 

 sub-tropical trees, which from actual observation and study are 

 known to be suitable for dry and for sandy situations and which 

 at the same time have the ability to withstand the wind and form 

 a screen to protect loose sand and dust. 



Extend the list, so obtained, by a series of planting experiments, 

 as opportunity affords, on representative situations. 



///. The Re-forestation of Eroded and Arid Areas on Slopes of 

 Mountain Ranges and on Plains. 



Prepare a list of both indigenous and tropical and sub-tropical 

 introduced trees, which from actual observation may be planted 

 on the arid and eroded areas on mountain sides and slopes, etc., 

 as for instance sections of Waianae Mountains and other 

 localities. 



Assistance and technical advice as to suitable species and known 

 habits of these should be obtained from the College of Hawaii 

 botanist who is also the consulting botanist of the Division of 

 Forestry. 



IV. The Production of Firewood. 



Prepare a list of both indigenous and introduced trees which 

 are known by experience to be good producers of firewood. 

 These to be planted below areas reserved or intended for water 

 conservation. They should be planted in sufficiently large areas 

 or copses to meet all the requirements of adjacent householders 

 and tenants on lands where planted. 



Such list is to be arranged according to the calorific value of 

 the wood produced by each species and the specific gravity of 

 each to be given at the same time. 



The calorific value and specific gravity to be determined by the 

 College of Hawaii from samples of wood furnished by the Divi- 

 sion of Forestry. 



V. The Production of Timber, Fence Posts, Railroad Ties and 

 Telephone Poles. 



Prepare a list showing, from past usage, what indigenous trees 

 are suitable for the above purposes. (\\'ith the possible excep- 

 tion of mamane and ohia lehua for fence posts it is presumed that 



