In Illinois, Lincoln was a well-liked and highly effective lawyer. In defending William "Duff" Armstrong, who was on trial for the murder of James Preston Metzker, Lincoln used judicial notice to prove an eyewitness could not have seen the events by moonlight by researching the relatively low angle of the moon on the evening in question, by using what still-extant periodical which will celebrate its bicentennial in 2018?
Farmer's Almanac