. The cyclopaedia; or, Universal dictionary of arts, sciences, and literature. Encyclopedias and dictionaries. ECLIPSE. Hence 31' 23' â gi' 4" = 19": 31' 5" â 31' 4"= 1" :-. 1 minute : 3", which fubtradted from o1' if, gives o" 16' 57" for the beginning of the eclipfe. If to 11' 44' :/>'' we add ih 27' 2c", we have 3* n' 56" ; we will therefore aflame 3" 12' for the end ; and by pro- ceeding as before, we find the- apparent of the moon from the fun in longitude to be 30' 37", and the motm'a ap- parent latitude 10' 48"
. The cyclopaedia; or, Universal dictionary of arts, sciences, and literature. Encyclopedias and dictionaries. ECLIPSE. Hence 31' 23' â gi' 4" = 19": 31' 5" â 31' 4"= 1" :-. 1 minute : 3", which fubtradted from o1' if, gives o" 16' 57" for the beginning of the eclipfe. If to 11' 44' :/>'' we add ih 27' 2c", we have 3* n' 56" ; we will therefore aflame 3" 12' for the end ; and by pro- ceeding as before, we find the- apparent of the moon from the fun in longitude to be 30' 37", and the motm'a ap- parent latitude 10' 48"; hence the moon's apparent diftance from the fun is V 1837- + 64b' = 1948" = 32' 28" ; but compared with the error to which the tables are ,' which may, at its maximum, be 30" in longitude. We have followed the fame method in computing the occultation of a fixed Osr by the moon ; that computation, therefore, may, it neccfl'ary, be rendered more correel in the lame manner. To cenJlruS a Solar Eclipfe by t'ji PriiuipLs of Projection. According to this projection, the apparent ellipfe defcribed by any point on the earth's furface, to any eye at the centre the fum of the apparent femi-diameters of the fun and moon of the fun, is projefted upon a plane at the moon perpendi cular to a line joining the earth and fun ; and the point of the ellipfe of projection, corresponding to any point of the other ellipfe where the fpetlator is, is the point where the centre of the fun appears to the fpettator. The centre of projection is in the ecliptic. If the lunar orbit be pro- perly laid down and divided, fhewing where the centre of the moon is at any time, we fhall then have the relative fituation of the centres of the fun and moon at any time feen from the given place of the fpeflator. From thefe is now 3 1' 2" ; confequently the eclipfe is ended. Let us next affume the time 3'1 6', 2nd the apparent dif- tance of the moon from the fitn in longitude is 28' 28'',
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Keywords: ., bookcentury1800, bookdecade1810, booksubjectencyclo, bookyear1819
