the changeable Stars . zii 
Ftol. 13th and 1 8th Ophiuchi, 4th magnitude. 
If there is no error in the Catalogue, thefe two ftars have dis- 
appeared ; but I am confident that Ptolemy’s 13th is Flam- 
steed’s 40th, and that Ptolemy’s 18th ought to be marked 
with a north latitude inftead of fouth, which would make it 
agree nearly with Flamsteed’s 58th. 
or Sagittarii. 
Mr. Herschel, with great reafon, has placed this ftar 
among thofe which probably have changed their magnitudes. 
1 had long fince remarked the fingular difagreement in all the 
Catalogues, which induced me to obferve it frequently, parti- 
cularly in 1783, 1784, and 1785, when it appeared of the 
2 . 3d magnitude, and brighter than tt Sagittarii. 
6 Serpentis. 
Montanari fays he faw this ftar of the 5th magnitude, 
and that the next year it grew bigger. I examined it fre- 
quently in 1783, 1784, and 1785, and found it always lefs 
than $ Aquilae, equal to (3 Aquilae, and P Ophiuchi; 4th 
magnitude. 
Tycho’s 27th Capricorn!. 
This ftar was not vifible in Hevelius’s time ; nor could I 
fee it 1778, 1782, 1784, with the tranfit-inftrument. 
Ee2 , VTtfCHo’s 
