WEATHER BUREAU. 77 



both the Weather Biiieau and the radio service for telephonic com- 

 munication to and from the ishintl. 



Tiiis otFers an opportunit}' for cooperation by the radio service in 

 the matter of reconstruction and maintenance of tlie Thunder Bay 

 Ishind telephone line. 



WHITEFISH POINT-GRAND MARAIS (MICH.) SECTION. 



[Telephone.] 



No interruption of moment occurred on this line. The twice-daily 

 rejjorts received from Whitefish Point during- navi<jjation are of de- 

 cided importance to shipping interests. The reports are addressed 

 " Observer, Sault Ste. Marie," transmitted through to Grand Marais 

 Coast Guard station, including- the 10 miles of Weather Bureau line 

 to Vermillion l*oint, thence by a private telei)hone line to Seney, 

 where they are transferred to a Western Union Telegraph wire. 



The country through which the private telephone wire line runs is 

 sparsely settled. Information has been received that the line is 

 deteriorating and that it is only a question of time when it will be 

 abandoned. 



It is understood that the Navy Department is considering placing 

 a radio station at Whitefish Point, which will alTord communication 

 with Sault Ste. Marie, provided a 3-mile land line can be built be- 

 tween Detour and Detour Point. If established, this channel can be 

 used for transmission of Weather Bureau reports to and from 

 Whitefish Point. 



NORTH AND SOUTH MANITOU ISLANDS-SLEEPING BEAR POINT (MICH.) SECTION 

 AND BEAVER ISLAND-CHARLEVOIX (MICH.) SECTION. 



[Telephone.] 



These two worked satisfactorily throughout the year. 



SAN FRANCISCO-POINT REYES-MOUNT TAMALPAIS (CALIF.) SECTION. 



[Telephone.] 



Extensive use is made of this line by the Coast Guard Service, 

 which cooperated with the Weather Bureau in the preceding year in 

 a reorganization plan as set forth in the report for June 30, 1919. 



About 5 miles of new^ wire was strung by that service between Point 

 Eeyes and Fairfax, replacing faulty wire placed in the course of 

 reconstruction of the line during the previous year. 



A plan for the maintenance of the line jointly by the Weather 

 Bureau and the Coast Guard Service was entered into April 1, 1920, 

 which designates certain sections for which the Weather Bureau and 

 Coast Guarf] Avill Ix' responsible, separately. This has been of ma- 

 terial advantage to the Weather Bureau. 



A total of 1,518 messages were trani5mitted during the year, mostly 

 observational reports and requests for information. No commercial 

 liusiness is handled. 



The three test stations installed in May, 1919, and mentioned in the 

 report for last year have further demonstrated their usefulness in 

 locating trouble. The portion of the line between Mount Tamal- 

 pais and Mill Valley (4 miles) worked generally well throughout 



