The first pictures are of a 1905 Holt harvester being pulled by a 27 mule team.
Lots of steam tractors were operating during the day.
Note the size of these tractors!
This is a bale press. Hay from the stack is raised onto the platform and raked into an opening. The horses are then driven around in a circle which causes a press to push up from the bottom and form a bale in the box above the opening. The bale is then manually wrapped with baling wire and then the press is released, the door is opened, and out comes a bale of hay. As you can imagine, it took a long time to process all of the hay into bales.