516 REPORT— 1873. 



I send you a short paper read before our Eoyal Society, in which I brought 

 together all the available observations of variation at Sydney. So much may 

 be of interest to science, but the curves of daily variation were only added 

 for the use of our local survej'ors. 



I have a great mass of meteorological work, of which only monthly means 

 have been printed. I wUl by next mail send you a complete set of our pub- 

 lished results, from which you will be able to see what the means are derived 

 from, and whether any of the individual observations are likely to be of 

 service. Generally the country results are taken from one observation (per 

 day) at 9 a.m., and at Sydney from three observations, 9 a.m., 3 p.m., and 9 p.m. 



Of self-registering instruments we have an Aaiemometer at work since 

 1863, from which the direction of wind to sixteen points and the total velocity 

 and mean daily force of wind have been published. 



A Barograph at work since 1870 : mean daily and highest and lowest 

 readings published. 



Two Pluviometers, one 65 and the other 7 feet above the ground : monthly 

 amount from the one G5 feet high published. At work, one since 1867, the 

 lower one since 1870. 



Two Tide-gauges, one at Sydney since 1867, the other at Newcastle since 

 1870; no results published. 



(2) I cannot state on what terms they could be opened up to men of science 

 uutU I know what is wanted, for it may be only a fraction of what I have 

 mentioned would be of any use. I may say that if fifteen or twenty sets, such 

 as I vnR send you next month, wiU meet the want, I will be glad to send 

 them ; and if a portion only of the individual results are wanted, the Govern- 

 ment here might perhaps grant money to print them if asked to do so by the 

 British Association. Yours faithfully, 



H. C. Russell, 



Govt. Astronomer, 

 Balfour Stewart, Esq., 



The Owens College. 



Toronto Obsei"vatory . 



Magnetic Observatory, Toronto, Canada, 

 April 10, 1873. 

 Dear Sir, 



I am in receipt of your letter of March 6, enclosing copy of resolution of 

 Subcommittee of Scientific Committee of British Association. The individual 

 observations made at Toronto are as follows : — 



Meteorological, from 1853 onwards. — Six daily observations of the ordinary 

 elements at 6, 8 a.m., 2, 4, 10, 12 p.m. ; continuous record of the wind ; 

 and during 1870-71 bihourly observations of the ordinary elements through 

 the 24 hours, on three days in the week. 



Of the above, the observations at 6 a.m., 2 p.m., 10 p.m., with the means 

 of the six observations and the daily resultants of the wind for the whole 

 day, have been always published in the ' Canadian Journal.' 



Magnetism — Besides the regular monthly determinations of Declination, 

 Dip, and Horizontal Force, six observations of the Difi'erential Instruments 

 have been taken daily since 1856, at the hours above named. Throughout 

 the series, tiU recently, the disturbed observations have been sejmratcd and 

 grouped in the manner adopted by Sir E. Sabine. 



Yarious deductions both from the Meteorological and Magnetical Observa- 



