on an Eclipfe sf the Sun. 1 1 9 
light. All I attended to was, firft, the ring, and then the 
luminous fpeck which appeared through the difk of the 
'Sun. Thele made the fame imprefiion 0.11 all who ob- 
ferved with me. 
It is not eafy-to make celeftial obfervations at fea with 
the fame precifion and delicacy as they are made at land, 
on account of the motion of the £hip, and want of con- 
venience to ufe the inftruments. It would have been 
difficult (even if we had had a Micrometer) to have 
meafured either the breadth of the ring, in order 
to fee if it was equal every where, or the diftance 
between the luminous fpeck feen on the difk of the 
Moon and its limb. I regret, however, exceedingly not 
having been able to make obfervations which would 
have been of fach ufe in aftronomy. 
xieux du Soleil au travers du difque de la Lune. Ce raviftement jproduiflt le 
mime effet furceux qui obfervoient avec moi, 
II n’eft pas facile de faire en mer des Obfervations Celeftes avec autant de preci- 
lion et de delicatefle qu’on les fait a terre, a caufe da mouvement du vaiffeau et 
de la gene a fe fervir des inftrumens. II auroit ete difficile, quand meine on 
anroit ete pourvu d’un Micrometre, de mefurer la largeur de ,1’anneau pour 
examiner f’il efoit egal partout, com me auffi la diftance du point lumineux vu 
fur le difque de ia Lune jufqu’a fon limbe. j’ai bien du regret de n’avoir pu fair© 
C$3 obfervations qui auroient ete d’un grand avantage pour la Pbiftque de,s aftre&» 
■8W9* 
