Moving from left to right is the story:
A Miwok village on a stream north of the San Francisco Bay.
A Miwok in a reed boat spies General Mariano Vallejo standing in front of his adobe, the first permanent structure in the area.
An early steam ship is stuck on the mud flats. In the foreground an ox wagon brings some early settlers to the new settlement of Petaluma.
A blacksmith shop is an early business in the thriving community, which is soon served by a steam railroad.
Here, in front of the modern 1890s downtown, is Lyman Byce, co-inventor and promoter of the first practical egg incubator. This invention turned Petaluma around and put it on the map.
A typical small poultry ranch produces the eggs that are being brought to be washed and packed for shipping. And in the sky, Weisman flies the world's first mail flight from Petaluma to Santa Rosa.
Eggs are packed and brought to the dock, for shipment by boat down the river to San Francisco or Sacramento, and from there to anywhere in the country or overseas.
Finally, the poultry industry gives way to the cows and the dairy industry.
A dairy farmer is bringing a wagon of milk to sell in town or ship down the river.