Ohservations of the Transit of Mercury. 



185 



I. 22»> OS"* 34.5- — [1.8715] p Sin cp' — [1.9156] p Cos cp' Cos (226° 10' — A) 



II. 22 08 42.0 — [1.8738] o Sin cp' — [1.9147] p Cos cp' Cos (226' 40' — X) 



III. 5 37 31.1 —[1.2500] p Sin -r [2.0415] p Cos 9)' Cos (172= 49'— A.) 



IV. 5 40 38. 6 — [1.2595] p Sin cp' — [2.0407] p Cos cp' Cos (173° 32' — A) 



The numbers in brackets are logarithims of numbers ex- 

 pressing seconds of time, and p is the radius vector of the 

 earth for the given place whose geocentric latitude is 

 For convenience of reference we have the following table 

 of observers and places.* 



Observatory. 



Observer. 





Longitude. 



Dudley Observatory, 



Boss, 



— 



13'" 



13s 



Helderberg Station, 



Landreth, 



— 



12 



10 





Wilson, 



— 



12 



10 



x\lleghany, Penn., 



Langley, 



+ 



11 



51 



Hanover, N. H., 



Paul, 



— 



19 



04 



So. Bethlehem, Peon., 



Doolittle, 



— 



6 



40 



Cincinnati, Ohio, 



Stone, 



. + 



29 



29 





Howe, 



+ 



29 



29 



Ann Arbor, Mich., 



Watson, 



+ 



26 



43 



Glasgow, Mo., 



Pritchett, 



+ 



63 



13 



Hastings on Hudson, 



Holden, 





12 



? 



u a 4( 



Draper, 





a 



u 



U U (i 



Barker, 





(( 



(( 



New Haven, Conn., 



Skinner, 





16 



30 



<( (( u 



Beebe, 





16 



30 



t( C( (( 



Hazen, 





16 



30 



Washington, D. C, 



Newcomb, 





00 



00 



Annapolis, Md., 



Naval Acad., 





2 



15 



Antwerp, Brussels, 



de Boe, 





325 



51 





von Ertbon, 





325 



61 



Wimbledon, Eng., 



Penrose, 





307 



17 



*Tliis table (and the subsequent comparison of observed contacts) includes 

 some materials not available to me at the time of reading this paper, and 

 I have accordingly taken the liberty of revising this part of my remarks 

 by the insertion of the additional data. 



Trans, ^a;.] 24 



