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VI. An Investigation of all the Changes of the vanable Star in 
Sobieski’s Shield, from five Tear’s Observations, exhibiting its 
proportional illuminated Parts, and its Irregularities of Rota- 
tion ; with Conjectures respecting unenlightened heavenly Bodies. 
By Edward Pigott, Esq. In a Letter to the Right Hon. Sir 
Joseph Banks, K. B. P. R. S. 
Read February 7, 1805. 
Bath, 1802. 
The object of the first part of this Paper is a further in- 
vestigation of the periodical and other changes of brightness 
of one of the variable stars I discovered in 1 795, that in 
Sobieski’s shield, an account of which the Royal Society did 
me the honour of publishing in their Transactions. Those 
determinations being deduced from a few periods made near 
the time of discovery, must of course remain unsatisfactory, 
however exact the observations themselves may be, until con - 
finned by an additional set, or by others made at a greater 
interval of time ; for which purpose I occasionally continued 
keeping a journal of its changes for near five years, and am 
happy to find that they have answered my expectation, parti- 
cularly by giving us an insight into its irregularities, as will 
be shewn hereafter. 
Variable Star in Sobieski's Shield. 
S. declination jf } for the end of June, i 79 6. 
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