Senator Robert C. Byrd was known for his extensive knowledge of the history of the Senate. A couple of his publications on the Senate can be found in the Congressional Serial Set:

The Senate, 1789-1989 (Serial 13723-13726; S. doc. 100-20)

The Senate of the Roman Republic :  addresses on the history of Roman constitutionalism (Serial 14209; S. doc. 103-23)

The New York Times store sells original U.S. patent models in its online store. Years ago, the patent office required that scale models be submitted with patent applications. Eventually, the models took up too much space and were auctioned off. Read this story in Wired to learn more.

A recent obituary of Floyd Dominy, onetime commissioner of the Bureau of Reclamation, quotes from a 1965 government publication, Lake Powell, Jewel of the Colorado (SuDoc  I 27.2:L 14p). 

An interview in the New York Times Magazine reveals that artist Jenny Holzer makes paintings out of declassified government documents. You can see images of her artwork here.

The Honolulu Advertiser ran an interview with the retired Lt. Jim Channon, on whose research the recent film "The Men Who Stare at Goats" is based. In the article, Channon relates that his work resulted in an Army field manual entitled Evolutionary Tactics, published in 1978. I haven't been able to identify this FM (perhaps it was not distributed?). There is a book entitled First Earth Battalion Field Manual by Jim Channon for sale, which is supposedly a reprint of the 1978 FM. It doesn't look like any FM I've ever seen, though.