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XIV. Continuation of an Account of the Changes that have hap- 
pened in the relative Situation of double Stars. By William 
Herschel, LL. D. F. R. S. 
Read June 7, 1804. 
In my former Paper,* I have given the changes which have 
happened in the situation of six double stars. When the 
causes of these observed changes in the double star Castor 
were investigated, I had recourse to the most authentic obser- 
vations I could find, of the motions in right-ascension and polar 
distance of this star. But the Tables which have been lately 
published, in the last volume of the observations made by the 
Astronomer Royal at Greenwich, give us now the proper motions 
of 3 6 principal stars, of which « Geminorum is one; and, as 
the motion of this star, especially in north polar distance, is 
very different from what it has been supposed in my former 
examination, it will be necessary to review the arguments which 
have been used, in order to ascertain what will be the result of 
this new motion. We shall here again follow the order of the 
paragraphs of the former Paper, and denote those which treat 
of the same motions, with the same letters, that they may be 
readily compared. 
Single Motions . 
(a) The small star x cannot be alone in motion, as we have 
now, in the new Tables I have mentioned, an evident proof that 
the large star « is not at rest. 
* See Phil. Trans, for 1803, p. 339. 
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