r 25 ] 



OBSERVATIONS o/^//^f LUNAR ECLIPSE, March iM, 

 1783. Communicated by the Rev. H. USSHER, Z). Z>. 



X WA S accompanied and afllfted in the following obfervations Read De- 

 by the Rev. W. Hamilton, Member of this Academy, and by ""^^^ ^' 

 Mr. Arthur M'Guire. 



The latter gentleman obferved, with an Hadley's fextant, equal 

 verfed fines of the uneclipfed part, being anxious to fee how 

 nearly the middle of the eclipfc might be deduced from that 

 kind of obfervation, which at fea inight be of ufe, when the 

 weather happens to be too hazy to fhew the fpots diftindly. 



Mr. Hamilton made his obfervations with a telefcope of two feet 

 focus double objed glafs. I obferved the beginning and end of the 

 eclipfe, and the beginning and end of total darknefs, with 

 a night telefcope, the aperture bemg diminifhed about one third j 

 and the other phenomena with a telefcope of feventeen inches 



D ' focus 



