When James is told he can't have the magazines and sees they are going to Mr. Ame's son, he turns away to leave the room twice in successive shots.
At the congregation's initial offering meeting, a chicken in a wooden cage is placed on the table. In the next shot the cage has been turned 90 degrees (note the direction of the cage's handle). The basket with the cabbage is also in a different position.
James Stewart is riding away in a carriage after meeting President Lincoln. In the background you can see a bicycle rider on a trail slightly above them, actually riding faster than the carriage is traveling.
As the student is getting a Latin lesson, the tutor/housekeeper quotes, "Dominus meus," and says, "In other words, dinner is ready." Dominus meus means "my God."