Driving on I-5 through northern California takes you through a lot of farm land, and reminds you just how much of the American economy is agriculture. This means silos – lots of silos, which of course got me thinking. . . From top to bottom: Two silos bridged by a glass Miesian volume; Two silos on a courtyard base, bridged at the top; a picturesque collection of three silos and a grain elevator; a battery of six silos, spaces cut between them, topped with a temple form.