42 
with the rocks hiirtHng about you, some crashing to the valley 
below and some breaking through the trees over your head." 
For the purpose of guarding the purity and continuance of the 
water supply and for preventing further damage, as described 
above, to the forest growth which it is essential to maintain in a 
primitive condition if the water supply is to be increased and 
made available for use, the Board of Commissioners of Agri- 
culture and Forestry has adopted Rule V and reconimends its 
promulgation. 
Very respectfully, 
C. S. JUDD, 
Executive Officer and Superintendent of Forestry. 
(PROPOSED RULE V) 
Honolulu, Hawaii, April 19, 1920. 
Board of Commissioners of Agriculture and Forestry, 
Honolulu. 
Gentlemen: Attention has for some time and particularly of 
late been centered on the undesirable introduction of Hilo grass 
into our native forest by the seed being carried on the shoes and 
trousers of pedestrians and dropped along existing trails where 
it germinates and soon spreads to the detriment of the indigenous 
ground cover. Instances of this, such as the trail from the Waia- 
hole tunnel over the top of the Koolau Mountain range to Waiawa 
Valley have been cited and particular attention has been called to 
thf, spread of Hilo grass along the trail at the Palolo crater within 
the Honolulu Watershed Forest Reserve. 
The damage done to the native forest by the spread of Hilo 
grass, the ease with which one detrimental factor may upset the 
balance of nature and cause the native forest to deteriorate, and 
the function of the forest on the steeper slopes of our mountains 
back of Honolulu in conserving the sources of water supply have 
been, set forth in detail several times and do not need repetition 
here. 
Witli the city and Territory devising ways and means of 
enlarging the water supply of Honolulu, a problem which is be- 
coming increasingly important, it seems only proper that this 
Board should participate in the solution of the problem by giving 
the forests cn the city's watershed the best possible protection 
and freedom from deteriorating influences. 
Nui'c'nu Valley receives this protection by Rule HI of this 
Divisi(-n approved on March 31, 1916, and I deem it my duty in 
compliance with paragraph 7 of Sec. 481, R. L. H. 1915 to recom- 
mentl the adoption of the attached proposed Rule V of this Di- 
vision. 
The law quoted above reads as follows : 
'Tt shall be the duty of the board : 
