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OBSERVATIONS ON JUPITER IN 1870-71. 
By the Key. T. W. WEBB, M.A., F.R.A.S. 
HE phenomena of Jupiter during and after the opposition 
in 1869 formed the subject of a detailed examination, 
the principal features of which appeared in the Popular Science 
Review for April, 1870. Although no very important conclu- 
sion was deduced at that time, it seemed desirable that the 
observations should be continued during another opposition, as 
the extension of a series always possesses a certain value, whether 
it may be for confirmation or correction, and either change or 
persistency would not be without its own interest or significance. 
Accordingly, on Nov. 15, 1870, the planet was again brought into 
the same telescopic field, and the results of a scrutiny carried on 
through forty-nine nights, till April 15, 1871, are now laid before 
the public. The nomenclature originally adopted having still 
answered satisfactorily the purpose of identification, we shall 
speak, as before, of the brighter parts of the disc as the Equa- 
toreal and Two Temperate Zones , and of the darker stripes as 
the Two Torrid and Two Temperate Belts , to which must be 
added the South Sub-torrid Belt , subdividing the South tem- 
perate zone, and the Two Polar Regions. 
A comparison of the former observations with those of Mr. 
Gfledhill, at Mr. Crossley’s observatory, Halifax, and those of 
Professor Mayer, at Lehigh University, U.S., has brought out 
an unsuspected omission on my part, to which allusion ought 
to be made. Though my attention was especially directed to 
that part of the disc, I never detected the thin elliptical ring 
which both those eminent observers have delineated as extend- 
ing in one place across nearly the whole breadth of the South 
temperate zone, but which, as far as I know, has escaped the 
notice of other astronomers. 
The present series has been carried through with my silvered 
speculum of 9 inches, and a power of 212 : as, even on those 
rare occasions when the air afforded sufficient sharpness for 450, 
there was a want of adequate light in that ocular. The atmo- 
