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ACCOUNT OF A NEW COMET OBSERVED BY M.DABADIE, 



Professor of Mathematics at the College of Port Louis. 



[Communicated by Sir ALEXANDER JOHNSTON from Sir CHARLES COI.VILLE, 

 Governor, &c. &c.] 



Port Louis, 25th August, 1830. 

 [MEMORANDUM.] 



TNCLOSED is a statement of the observations and calcu- 

 lations of our professor of mathematics at the Royal 

 College of Port Louis, showing the elements by which the 

 orbit of the comet of April, 1830, may be ascertained. It is 

 probable that his Excellency might be desirous of transmitting 

 this paper to Sir Alexander Johnston, as it will be valuable for 

 connecting the series of distances which may have been ob- 

 served in New South Wales and the Cape of Good Hope, on 

 the visit of this stranger ; for it does not appear that any notice 

 exists of this comet having before appeared, at least none of 

 the books we possess designate the same extent or inclination 

 of the orbit. 



Ever yours, &c. 



(Signed) C. TELFAIR. 



Note. The original observations are preserved in the 

 College. 



Comet of the llth of April, 1830. 



At seven o'clock, p. M. on the 16th of March, Mile. 



asked me the name of a round nebulosity which she per- 

 ceived between the constellations of the Camelion and the 

 greater cloud. I was immediately convinced that it was a 

 comet. By the next day the nucleus had advanced nearly five 

 degrees towards the north, and it continued that direction with 



