154 Colonel Bemifoy's Astronomical, Magnetical, [August, 



Article XVIII. 



Astronomical, Magnetical, and Meteorological Observations. 

 By Col. Beaufoy, F.R.S. 



Bushey Heath, near Stanmore. 



Latitude 51° 37' 42" North. Longitude west in time 1' 20-7". 



Astronomical Observations. 



June 5. Immersion of Jupiter's first (I4 b 7' 17" Mean Time at Bushey. 



satellite ( 14 8 38 Mean Time at Greenwich, 



9. Immersion of Jupiter's third <!3 45 26 Mean Time at Bu-hey. 



satellite ( 13 46 4T Mean Time at Greenwich. 



28. Immersion of Jupiter's first 5 14 18 10 Meau Time at Bushey. 



satellite 1 14 19 31 Mean Time at Greenwich. 



30. Emersion of Jupiter's first (11 1 44 Mean Time at Bushey. 



satellite $11 3 05 Mean Time at Greenwich, 



Magnetical Observations, 1818. — Variation West. 



Month. 



June 



1 



2 



3 



4 

 5 

 6 

 7 

 8 

 9 

 10 

 11 

 12 

 13 

 14 

 15 

 16 

 17 

 18 

 19 

 20 

 21 

 22 

 23 

 24 

 25 

 26 

 27 

 2S 

 29 

 30 



Mean for 



the 

 Month. 



Morning Observ. 

 Hour. Variation. 



8h 25' 



8 35 



8 30 



8 30 



8 30 



8 30 



8 30 



8 15 



8 15 



8 25 



8 35 



8 40 



8 40 



8 35 



8 30 



8 35 



8 30 



8 25 



8 20 



8 30 



8 40 



8 25 



24° 35' 59' 



24 32 46 



24 33 11 



24 34 14 



24 33 04 



24 32 56 



24 44 34 



24 34 01 



24 33 48 



24 36 00 



24 35 02 



24 34 15 



24 36 48 



8 



8 



30 

 40 



8 30 



8 25 



8 25 



8 30 



8 30 



8 30 



24 35 42 



24 32 48 



24 34 56 



24 34 36 



24 32 46 



24 33 42 



24 32 32 



24 32 51 



24 33 14 



24 33 32 



24 31 48 



24 31 57 



24 31 50 



24 32 42 



24 34 53 



24 34 02 



24 33 47 



Noon Observ. 

 Hour. Variation. 



1 25' 



1 25 



1 35 



1 25 



1 10 



1 50 



25 

 25 

 30 

 30 

 20 

 20 

 30 

 25 

 20 

 25 

 25 



40 

 20 

 30 

 35 

 25 

 25 

 30 



1 25 



45 

 15 



1 27 



24° 44' 34" 



24 46 24 



24 47 38 



24 47 30 



24 4 9 22 

 24 53 42 



24 44 37 



24 45 12 



24 43 45 



24 44 00 



24 41 



24 44 



24 44 45 



24 44 50 



24 44 24 



24 45 26 



24 47 30 



44 

 12 



11 

 51 



57 



24 46 



24 43 



24 44 



24 43 22 



24 46 37 



24 44 43 ■• 



24 44 30 



24 44 31 



24 45 06 



24 45 18 



Evening Observ. 



25 

 10 

 40 



7 35 

 7 35 



24 45 11 



30 

 50 

 30 

 25 

 35 

 35 



7 33 



24 

 24 

 24 

 24 

 24 

 24 

 24 

 24 

 24 

 24 

 24 



36 44 



37 36 

 37 57 



37 11 

 36 26 

 36 56 

 39 45 



38 41 



39 05 

 35 40 

 35 28 



24 37 40 



In taking the monthly mean of the observations, those on the 

 morning and noon of the 7th are rejected, being so much in 

 excess, for which there was no apparent cause. 



