112 



Report of the Keiv Committee. 



a quarter of a mile north of the Observatory as a meridian mark, the 

 orientation of which, with respect to the Magnetometer, was determined 

 by the late Mr. Welsh, and has since been carefully verified. 



The observers' initials refer — W to Mr. Gr. M. Whipple, C to Mr. J. 

 E. Cullum, P to Mr. C. 0. L. Power, and P to Mr. P. G-. Pigg. 



Observations of Deflection for Absolute Measure of Horizontal Porce. 



Month. 



1874. 

 October 



November 



December 



1875. 

 January 



February 



March 



G. M. T. 



April 



May 



June 



July 



August 



September . . . 



27 



22 



26 



24 



22 



26 



24 



23 



28 



18 



21 



h m 

 12 33 p.m. 



2 17 „ 



12 24 p.m. 



2 14 „ 



1 7 p.m. 



2 31 „ 



11 56 a.m. 



12 24 p.m. 

 2 8 p.m. 

 2 37 „ 



12 48 p.m. 



2 18 „ 

 12 38 p.m. 



2 8 „ 



1 40 p.m. 



2 36 „ 

 12 40 p.m. 



2 16 „ 



1 34 p.m. 



2 38 „ 

 12 21 p.m. 



2 39 „ 

 12 noon. 

 1 56 p.m. 



Distances 



of 

 Centres of 

 Magnets. 



foot. 

 1-0 

 1-3 

 1-0 

 1-3 

 1-0 

 1-3 

 1-0 

 1-3 

 10 

 1-3 

 1-0 

 1-3 

 10 

 1-3 

 10 

 1-3 

 10 

 1-3 

 10 

 1-3 

 10 

 1-3 

 10 

 1-3 

 1-0 

 1-3 

 1-0 

 1-3 

 1-0 

 1-3 

 10 

 1-3 

 10 

 1-3 

 10 

 1-3 

 10 

 1-3 

 1-0 

 1-3 

 10 

 13 

 1-0 

 1-3 

 1-0 

 13 

 10 

 1-3 



Tempe- 

 rature. 



59-7 



59-8 

 36-5 

 39-2 

 32-8 

 331 

 42-6 

 43-8 

 40-2 

 41-8 

 •51-6 

 '523 

 62-8 

 65*9 

 71-4 

 71 1 

 69*5 

 73-8 

 74-6 

 75-8 

 73-6 

 77-8 

 67-4 

 '690 



Observed 

 Deflection. 



15 49 41 



7 8 23 

 15 44 4 



7 8 14 

 15 53 22 



7 10 19 

 15 52 52 



7 9 38 

 15 54 13 



7 10 9 

 15 51 16 



7 8 24 

 15 52 7 



7 9 11 

 15 51 4 



7 8 46 

 15 49 48 



7 8 24 

 15 50 10 



7 8 35 

 15 46 45 



7 8 3 

 15 48 38 



7 7 22 

 15 48 44 



7 7 50 

 15 47 7 



7 6 47 

 15 46 7 



7 6 48 

 15 45 43 



7 6 20 

 15 47 46 



7 6 46 

 15 44 55 



7 6 10 

 15 46 1 



7 8 19 

 15 43 39 



7 5 44 

 15 44 24 



7 5 45 

 15 43 8 



7 5 12 

 15 47 25 



7 7 8 

 15 44 58 



7 6 26 



Log-. 

 Mean. 



9-13650 



9-13726 



9-13647 



913678 



9-13602 



913586 



9-13655 



9-13620 



9-13629 



9-13649 



913549 



9-13617 



