314 



Oahu. 



On Oahu Mr. Dort and ]\Ir. White visited 37 stream-gauging- 

 stations and four rain-gauging stations. Twenty-two regular 

 stream measurements and one miscellaneous measurement were 

 made. The new Kalihi clock register station was complemented 

 by a footbridge for flood measurements. On September 12 a 

 measurement was made of the water develo]:)cd in the north portal 

 of the Waiahole Water Company tunnel which showed a dis- 

 charge of 20.6 million gallons per 24 hours. 

 Maui. 



^Ir. lUiiley and ]\lr. Christiansen visited 48 stream-gauging 

 stations, and made three measurements at regular stream-gaug- 

 ing stations and two miscellaneous measurements. During the 

 month four new clock register stations were completed on the 

 Kailua, Nailiilihaele, Waikamoi and Haipuaena streams on East 

 Alaui. An inspection and reconnaissance trip was made by Mr. 

 Larrison and Mr. Bailey from Kailua around East Maui, via 

 Hana, Kipahulu, Kau])o and Haleakala to investigate water con- 

 ditions. Future station sites on all streams east of Keanae and 

 between Hana and Kaupo were tentatively selected. It is he- 

 lieved that about 20 million gallons of water per day are now 

 running to waste in dry weather between Hana and Kaupo. which 

 could be utilized at liana, Kipahulu and Kaujxo at reasonable 

 construction and maintenance costs. A small part of this water 

 is now being used by the Kipahulu mill and for fluming pin-])Oses. 



Ten ditch-gauging stations were discontinued during the month. 

 Koiia Inirsfigation, Hawaii. 



Mr. Kimble, assisted by Mr. Wassman. has completed all pos- 

 sible storage sites but three in North Kona, and has com]:)leted 

 a clock register weir station on the Kiilac stream in South Kona. 

 Mr. Kimble reports that all field work, including the population 

 and present water supply census, will be completed in November, 

 leaving but routine rain-gauge reading and clock-register reading 

 to be done. 



Very res])ect fully, 



(r. K. I.ANKISOX, 



Superintendent of I I)(lrograph\'. 



Ammonia bombs are being tried out on some of the national 

 forests for the purpose of extinguishing forest fires. They are 

 said to have worked well in the case of l)rush fires where the fire- 

 fighters find difficulty in getting near enough to the burning area 

 to beat out the flames. I'^ach bomb exploded will extinguish fire 

 in a circle of about five yards in diameter. 



.Switzerland has four cooperative associations lor the growing 

 and marketing of forest ])rodncts. 



