Salusbury, Thomas, Mathematical collections and translations (Tome I), 1667

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1diſtances, the mutations, or if you pleaſe corrections, of a
ry few minutes, removeth the ſtar a very great way farther off.
As for example, in the firſt of theſe workings, where the
lation made the ſtar 60. ſemidiameters remote from the centre,
with the Parallax of 2. minutes; he that would maintain that it
was in the Firmament, is to correct in the obſervations but onely
two minutes, nay leſſe, for then the Parallax ceaſeth, or
commeth ſo ſmall, that it removeth the ſtar to an immenſe
ſtance, which by all is received to be the Firmament.
In the
cond indagation, or working, the correction of leſſe than 4 m.
prim. doth the ſame. In the third, and fourth, like as in the firſt,
two minutes onely mount the ſtar even above the Firmament.
In the laſt preceding, a quarter of a minute, that is 15. ſeconds,
gives us the ſame.
But it doth not ſo occur in the ſublunary
tudes; for if you fancy to your ſelf what diſtance you moſt
like, and go about to correct the workings made by the
thour, and adjuſt them ſo as that they all anſwer in the ſame
determinate diſtance, you will find how much greater
ons they do require.
SAGR. It cannot but help us in our fuller underſtanding of
things, to ſee ſome examples of this which you ſpeak of.
SALV. Do you aſſign any whatſoever determinate ſublunary
diſtance at pleaſure in which to conſtitute the ſtar, for with ſmall
ado we may aſſertain our ſelves whether corrections like to theſe,
which we ſee do ſuffice to reduce it amongſt the fixed ſtars, will
reduce it to the place by you aſſigned.
SAGR. To take a diſtance that may favour the Authour, we
will ſuppoſe it to be that which is the greateſt of all thoſe found
by him in his 12 workings; for whilſt it is in controverſie
tween him and Aſtronomers, and that they affirm the ſtar to
have been ſuperiour to the Moon, and he that it was inferiour,
very ſmall ſpace that he proveth it to have been lower, giveth
him the victory.
SALV. Let us therefore take the ſeventh working wrought
upon the obſervations of Tycho and Thaddæus Hagecius, by
which the Authour found the ſtar to have been diſtant from the
centre 32. ſemidiameters, which ſituation is moſt favourable to
his purpoſe; and to give him all advantages, let us moreover
place it in the diſtance moſt disfavouring the Aſtronomers, which
is to ſituate it above the Firmament.
That therefore being
poſed, let us ſeek in the next place what corrections it would be
ceſſary to apply to his other 11 workings.
And let us begin at the
firſt calculated upon the obſervations of Hainzelius and Mauroice;
in which the Authour findeth the diſtance from the centre about
3. ſemidiameters with the Parallax of 4 gr. 42 m. 30. ſec. Let

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