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VI. Refult of Calculations of the Obfervations made at various 
Places of the Eclipfe of the Sun , which happened on June 3, 
1788. By the Rev . Jofieph Piazzi ,Ci?, Profejfor of Afronomy 
in the Univerfity of Palermo ; communicated by Nevil Mafke- 
lyne, D. D. F. R . S. and AJlronomer Royal . 
Read January 15, 1789. 
TO DE. MASKELYNE. 
S I R, 
T HE fatisfaftion I had in obferving the ecliple of the fun 
on the third of June laft, with you and M. d’Arqtjier, 
at Greenwich, induces me to give you an account of the ufe 
made of the obfervations, and the confequences I have drawn 
from them. The obfervations which I have collected con-* 
cerning the fame eclipfe, and which were made in other 
places, contribute to the extenfivenefs of my calculations, and 
to determine the pofition of certain places, which had not 
been before accurately determined, as that of Dublin, that of 
Mitau in Courland, and Perinaldo in Italy. The longitudes 
of all the other places muft be referred to that of the Royal 
Obfervatory at Greenwich, as being the fir ft in Europe, and 
becaufe the obfervations which you have made in it, are by 
far more accurate than any others made elfewhere. 
The 
