Celestial and Terrestrial Globes. 221

the month ; and their sum will be the timeof day when the first point of Aries willpass the meridian.

Observe whan the equinox falls on the19th day of March in a year which is notbissextile, to seek the day of the month inthe right hand column of the table; andwhen it falls upon the 20th day of March,seek the day of the month in the left handcolumn, over which in either case, and underthe name of the month, you have the properdifference of right ascension to be added to thatfound above for the day of the equinox.

In bissextile years, seek the day of themonth in the left hand column, to the endof February, and for the intercalary day, or29 th of February, take out the differenceof right ascension answering to the first ofMarch, after which to the year’s end seekthe day of the month in the right handcolumn.

Having thus found the right ascension ofthe first point of Aries for any day in theyear, add thereto 11 h. 58 min. and youobtain the time of the right ascension of thefirst point of Libra.

Example