APPENDIX, iii 



Observations of the Eclipses of Jupiter" s Satellites at lienares in 1823 — 24. 



















Juang it i> at 



deo/u.t 



id. 









Dale. 



Satellite. 



Benares 



Time. 



By Nautical 



Connoissance 



Mr. Guiding- 

 ham s Madras 



Col.Seanfoy's 



Bushey Park 



Remarks npon the Benares sights. 













h. 













01 



servattons. 



Obserr 



itions. 





1823. 





h. 



m. 



s. 



m. 



5. 



',). 



m. 



.?. 



h. 



in. 



s. 



h. m. 



s. 





ISov. 21 



Imm, II. 



11 



59 



34 



5 



33 



06 



5 



33 



04 



5 



32 



21,6 







Dollond's Achr. Telescope used (5 feet Refractor.) 





I. 



12 



13 



36 



5 



31 



36 



5 



i5l 



51 



5 



32 



21,8 







Do. C Tin. of IV. had taken place i an hour bef. 



23 



Em. III. 



9 



59 



48 



5 



32 



45 



5 



33 



29 













Do.2(itli.£ the time given in the Aim.— &the Em. did 

 ( not take place for | an hour after its time. 



28 



Imm. I. 



14 



06 



27 



5 



30 



54 



5 



31 



08 



5 



31 



15,8 







Diagonal eyepiece app. wh. diminished the light. 





II. 



14 



35 



24 



5 



32 



03 



5 



32 



01 



5 



31 



01,4 







Do. 



SO 



I. 



8 



35 



09 



5 



31 



13 



5 



31 



27 













Dollond's four-feet Reflecting Teles. — Planet low. 





III. 



10 



58 



14 



5 



32 



33 



5 



34 



10 



5 



31 



28,8 







Ditto — Emersion not visible although marked so 



Dec. 5 



I. 



16 



00 



20,5 



5 



31 



10,5 



5 



31 



21,5 



5 



31 



48,5 







in the Ephemeries. 





II. 



17 



13 



05,5 



5 



32 



49,5 



5 



32 



49,5 



5 



32 



12,1 









7 



I. 



10 



29 



12,5 



5 



31 



36,5 



5 



31 



48,5 



5 



32 



05,4 







Both Telescopes used — gave the same instant- 



12 



I. 



17 



54 



44 



5 



31 



49 



5 



32 



00 









5 32 



04 



Good — Jupiter high. [very clear. 



14 



I. 



12 



23 



02 



5 



31 



39 



5 



31 



51 



5 



31 



41 









16 



I. 



6 



51 



10 



5 



31 



20 



5 



31 



30 













Reflecting Tel. Jup. low— Refrag. Tel. gave 7 sec. 





II. 



9 



08 



24 



5 



33 



03 



5 



33 



00 













Ditto — higher — ditto — 2 ditto. [earlier. 



21 



I. 



14 



16 



43 



5 



31 



26 



5 



31 



36 













Planet clear — Satellite close to him. Refrag. Tel. 



23 



I. 



8 



45 



02 



5 



31 



16 



5 



31 



24 













Planet dull — too early. 





II. 



11 



44 



33 



5 



32 



01 



5 



32 



00 













Planet tremulous. 



30 



Em. I. 



12 



51 



41 



5 



33 



56 



5 



31 



47 













Good Obs. but Satellite very near. 



' 1824. 



II. 



17 



07 



07 



5 



32 



34 



5 



32 



33 



5 



31 



16,1 







Bad — Satellite emerged from behind -}£ 's Disc. 



Jan. 5 



III. 



9 



56 



38 



5 



31 



41 



5 



31 



43 



5 



31 



10 







Very good — Reflect. Tel. always used hereafter— 



fit 



> I. 



9 



14 



14 



5 



31 



24 



5 



31 



24 



5 



31 



35,3 







Good — very clear atmosphere. [Imm. not visible, 

 Good observation, [altlio' marked so in the aim. 



10 



II. 



9 



03 



05 



5 



31 



58 



5 



32 



00 













12 



III. 



13 



57 



21 



5 



31 



49 



5 



31 



52 









5 31 



40 



Good. 



13 



I. 



16 



40 



39 



5 



31 



54 



5 



31 



56 , 









5 31 



05 



Jupiter low and vapoury. 



15 



I. 



11 



08 



51 



5 



31 



28 



5 



31 



30 













Very good— Planet near Zenith. 



17 



II. 



11 



40 



08 



5 



31 



39 



5 



31 



40 









5 31 



00 



Very good — ISth Immersion of III. invisible. 



22 



I. 



13 



03 



33 



5 



31 



31 



5 



31 



32 



5 



32 



09,8 







Good observation. 



24 



I. 



7 



32 



11 



5 



31 



26 



5 



31 



26 



5 



31 



52,2 







Good — Emersion II. obscured by clouds. 



29 - 



> I. 



14 



59 



09 



5 



32 



19 



5 



32 



20 









5 32 



15 



Jupiter low — Bands hardly visible. 



Feb. 7 



1. 



11 



21 



45 



5 



31 



13 



5 



31 



14 













Exceedingly clear — 14th cloudy. 



18 



11. 



11 



27 



22 



5 



31 



20 



5 



31 



20 



5 



31 



10 









Mar. 10 



I. 



8 



00 



12 



5 



31 



11 



5 



31 



12 













Good sight. 



14' 



II. 



8 



37 



02 



5 



31 



25 



5 



31 



26 













Very good. 



31 



III. 



10 



06 



44 



5 



33 



00 



5 



33 



01 













Pretty good — bells not clear. 

 Not well defined — Jupiter low. 



April 9 



I. 



10 



11 



25 



5 



31 



48 



5 



31 



49 













15 



_ .- 1 



II. 



8 



20 



50,5 



5 



31 



47,5 



5 



31 



49,5 













Good. 



Longitude of Mr. Cracroft's Observatory. 



By the First Satellite. 



Immersions. 

 Nautical Almanac. Connois.des Terns. 



Emersions. 

 Nautical Aim. Connois. des Terns. 



By the Second Satellite. By the Third Satellite. 



Emersions. 



Immersions. Emersions. 



5 



31 



36 



5 



31 



51 



5 



31 



56 



5 



31 



47 



«' 



30 



54 



fi 



31 



08 



5 



31 



24 



5 



31 



24 



5 



31 



13 



5 



31 



27 



5 



31 



54 



5 



31 



56 



5 



31 



10,5 



5 



31 



21,5 



5 



31 



28 



5 



31 



30 



5 



31 



36,5 



5 



31 



48,5 



5 



31 



31 



5 



3L 



32 



s 



31 



49 



5 



32 



00 



5 



31 



26 



5 



31 



26 





31 



39 



5 



HI 



51 



5 



31 



19 



5 



31 



20 



& 



31 



20 



5 



31 



30 



5 



31 



13 



5 



31 



14 



5 



31 



26 



5 



31 



36 



5 



31 



11 



5 



31 



12 



5 



31 



16 



5 



31 



24 



5 



31 



48 



5 



31 



49 



5 



31 



24 



5 



31 



35,7 



5 



31 



31 



5 



31 



31 



33 06 



32 03 



32 49,5 



33 03 

 32 01 



5 32 34 



,5 31 58 



5 31 



5 31 



5 31 



5 31 



Immersions. 

 5 32 33 



39 

 20 

 25 



47,5 



5 32 33 



5 32 36,5 



31 47,3 



5 32 45 



5 31 41 



5 31 49 



5 33 00 



5 32 18,8 



26,8 



32 11 ,9 



h. in. y. 



Mean of ten Immersions First Satellite, ...... 5 31 29,8 



ten Emersions ditto, & 31 3i 



Mean of eleven Imm. and Em. of the Second Satellite, 5 32 11 ,9 



Mean of five Tm. and Em. of the Third Satellite, 5 32 26,4 



Mean of fifteen comparative Observations at Madras 5 31 41,9 



Mean of live comparative Observations at Bushey Heath, .. 5 31 36,8 



Mean of the whole, ...... 5 31 46,75 



Mean, rejecting the II. & III. Satellites, 5 31 35,5 E. nearest correct Longitude. 



Towhich adding difference of meridian....... OS (according to Survey of Benares.) 



longitude of the Man Mundil or Hindu Observatory, 5 31 43,5 E . or 82" 55' 52^,5 East of Greenwich, 

 Longitude according to Reuben Burrows, . , „ ... , ■ • t ■ i •■••••••»•••••••• • °* 59 45 



