PROCEEDINGS FOR 1915 XVII 



ing" of the front surface to a paraboloid of revolution of a focal length 

 of 30 feet to an accuracy of a quarter wave length of light. 



The finished dimensions of the mirror will be diameter 73 inches 

 thickness 12 1-8 inches, weight about 4,500 lbs. 



All the heavy steel and iron parts of the mounting have been 

 successfully cast and machined, the large skeleton tube is completed 

 and work on the smaller parts amd the driving mechanism is under 

 way. The shop erection and fitting of the mounting will commence 

 shortly and it is expected to be completed before the end of the year. 



The Warner and Swasey Co. who are making the mounting have 

 built a one-tenth size working model of telescope dome and building 

 for exhibition at San Francisco. This is proving extremely useful in 

 settling the complicated questions arising in the construction of the 

 dome and accessories, which are being made by the same firm, and of 

 their proper relation to and working with the telescope. 



A good road of easy grade has been built by the Government 

 of British Columbia from the main road to the summit of Saanich 

 Hill, the site of the observatory. 



This hill has an elevation of 732 feet and is situated about 8 miles 

 north of Victoria. The water supply system has been completed and 

 the construction of the circular steel building to carry the dome and 

 contain the telescope will soon be begun. 



^ VIII. — Wireless Research Stations. 



In the report of last year reference was made to experiments at 

 the Dominion Observatory having in view the use of wireless tele- 

 graphy in the determination of longitudes at places remote from tele- 

 graph lines. The results of these experiments having been satis- 

 factory, an observer was sent to the upper Ottawa valley, provided 

 with a wireless receiving outfit, and portable astronomical apparatus. 

 The longitudes of four stations were determined, using the time signals 

 sent out from Arlington, D.C. The accuracy of these determinations 

 is believed to compare very favorably with those obtained by the 

 ordinary telegraphic method. The success of these observations will 

 undoubtedly extend the use of this method in determining accurate 

 geographical positions in remote and unmapped parts of the country 

 and will strengthen the arguments for the establishment of Research 

 Stations presented to the Government by the Council in their memorial 

 of October, 1912. 



IX. — Copyright. 



Guided by the resolutions of the Society on the important sub- 

 ject of Copyright, we have informed ourselves from time to time of 



