12 



AN ACCOUNT OF THE 



The barometer rose one millimetre : — 



Mercurial Barometer. 



0^761.5 

 0".762.5 



Aneroid Barometer. 



0'".751.5 

 0".752.5 



Most generally the aneroid coincides with the other barometer; the difference 

 between the two instruments was constant on this day. 

 The temperatures observed were as follows : — 



Although the sky was somewhat cloudy, we perceived several stars during the 

 total eclipse. The obscurity was very sensible, and it seemed to pass off more 

 rapidly than it came on. 



I remit herewith a note and a design from M. Pinelais, who observed the eclipse 

 with the telescope you had the goodness to lend us. M. Laultre, who observed 

 the contacts on shore, very distinctly saw the whitish corona that surrounded the 

 moon during the total eclipse. 



In repeating my thanks to you, permit me to ask that you leave for us, in Val- 

 paraiso, a copy of your own observations. 



Accept, sir, the assurance of my most distinguished consideration. 



VIALETES D'AIGNAN. 



M. GiLLiss, Lieut. U. S. N. 



TRANSLATION OF NOTE FROM M. PINELAIS, FRENCH NAVY. 



The spots observed appeared of a fine bright-rose color. Their maximum height 

 may be valued at most 1'. The first to appear were those at A ; then those at B, 

 and finally, about the first third of tlie period of the eclipse, those which extend 

 from B to C. The height of these last was less than that of the protuberances of 

 A and B, except at the point C, where it was very nearly the same. 



A little while before the commencement of the total eclipse, I saw, towards the 

 centre of the moon, a spot of yellowish light of feeble intensity, but I was not 

 able to follow it during totality. 



The small extent of the field of the telescope prevented me from observing the 

 luminous corona, which should have surrounded the moon during the total eclipse. 



The position of the spot chosen for observation is long. 81° 3' 20" west from 

 GreenAvich (Fitzroy), latitude 5° 50' south. 



The instrument employed was a (zenith) telescope. The image given (on fol- 

 lowing page) is reduced. 



