Attempt to apply instrumental measurement to the Zodiacal Light

                                off, and their index error obtained by reference to known stars 
on either side. This was usually done 2 or 3 times each night, 
& the mean has been entered in the accompanying table as a 
single observation: - 

Observations of the Zodiacal Light.
In Lat. 33[degree]S & Long. 1[degree].14'W.
Date Place of observation Eastern apex of Z.L. A[R?] h m D 0 1 Sun's A[R?] h m D 0 Western apex of Z.L. A[R?] h m D 0 Eastern elongation [degree] Western elongation [degree] Remarks on  Eastern or following portion of Z.L. or that seen at evening Western or preceding portion of Z.L. or that seen at morning
1843 June A Plain Very conspicuous Sun, but not well
1843 July A Mountain 1500 ft Very conspicuous 
1843 August Plain Very conspicuous Not see in the morning, though looked for. 
1843 Septem Mountain 2000 ft Seen in first part of the month Nothing visible 
1844. Feb<sup>y<\sup> Plain Very strong, long, nar=
=row and bright. 
1844 May Mount<sup>n<\sup> 3500 <sup>ft<\sup> Very bright 
1844 July Mount<sup>n<\sup> 6500 <sup>ft<\sup> Very bright 
1844 Aug. Sep<sup>r<\sup>. Mount<sup>n<\sup> 6500 <sup>ft<\sup> 
1844 Oct<sup>r<\sup>. 2 at 7<sup>h<\sup> P.M. Mount<sup>n<\sup> 6500 <sup>ft<\sup> 16,,15 -24,,0 12,,34 -4 56 
1844 Oct<sup>r<\sup>. 5 at 7<sup>h<\sup> 50<sup>m<\sup> P.M. Mount<sup>n<\sup> 6500 <sup>ft<\sup> 16,,18 -24,,0 12,,45 -5 53 
1844 Oct<sup>r<\sup>. 10 at 7<sup>h<\sup> 50<sup>m<\sup> P.M. Mount<sup>n<\sup> 6500 <sup>ft<\sup> 16,,20 -22,,0 13,,4 -7 50 
1844 Dec<sup>r<\sup> 5 Mount<sup>n<\sup> 4500 <sup>ft<\sup> Very doubtful, but a quan=
tity of light in the West, long after the time for twi=
light to cease, the ill-defined a=
pex being observed on Dec<sup>r<\sup> 5 
at 9<sup>h<\sup>. P.M., had A[R?] 20<sup>h<\sup>,,50.<sup>m<\sup>.D -36[degree] Not visible 
1845. Feb<sup>y<\sup> Mount<sup>n<\sup>. 4500<sup>ft<\sup>. Not visible Well seen in the E, latter part of this month 
1845. March. Apr Mount<sup>n<\sup>. 4500<sup>ft<\sup>. Not visible Very strong 
1845. May Mount<sup>n<\sup>. 4500<sup>ft<\sup>. Seen towards the end of the month. Very strong 
1845 June 5 at 6<sup>h<\sup> 46<sup>m<\sup> Mount<sup>n<\sup> 4500 <sup>ft<\sup> 9,,25 +12 5,,3 +23 66 
1845 June 5 at 17<sup>h<\sup> 40 Mount<sup>n<\sup> 4500 <sup>ft<\sup> 1,,21 +17 55  
1845 July 6 at 7<sup>h<\sup> Mount<sup>n<\sup> 4500 <sup>ft<\sup> 12,,27 +6 7,,2 +23 79 
Mount<sup>n<\sup> 4500 <sup>ft<\sup> 3,,29 +12 53 
Sep. 24 at 8<sup>h<\sup> Plain 16,,30 -23 11,,54 +1 69 
Oct<sup>r<\sup> 3, at 8<sup>h<\sup> 8<sup>h<\sup>,,30<sup>m<\sup> Plain  17 ? -23? 12,,37 -4 66 Apex of the Z.L. concealed in the Milky Way, besides which the brightness & position of Venus rendered the observations very difficult 
Oct<sup>r<\sup> 3, at 9<sup>h<\sup>