At the National Archives, Washington DC you are allowed to sign out one "cart" full of material at a time. Here's a picture of my cart, with 11 large bound volumes on it. Each volume probably weighs an average of 20 lbs. and fills up the whole small desk you are allowed. Many of the volumes, especially those containing what we'd call spreadsheets today, are much larger and take up two desks when opened.

The volumes you see are part of Record Group 92, Entry 2117, and comprise what I think is "subentry 1." I bypassed two of those volumes which did not contain records of the "Military Department" but only contained the "Indian Department" and some other material. The Indian Department reports contain lists of material the U.S. purchased with appropriations for various tribes, which are listed, which seemed to be "$1000.00" pretty consistently. I didn't notice whether that amount was per quarter or per annum. The lists contained items you'd expect such as wampum, tomahawks, axes, etc.

I haven't yet seen the three remaining volumes on the bottom shelf and I'm hoping to do that tomorrow.