High temperature infra-red transmission studies of ultrasil fused quartz for Project FIRE /

Photocopy.

Application of infra-red techniques to military training.

"Contract Nonr 61339-759."

The infra-red spectra of the acetylacetonates of uranium, thorium, iron, and magnesium.

Photocopy.

The effect of certain dissolved substances on the infra-red absorption of water,

"Reprinted from the Physical review, n.s., vol. XX., no. 5, Novermber, 1922."

Twelve years a slave. Narrative of Solomon Northup, a citizen of New York, kidnapped in Washington City in 1841, and rescued in 1853, from a cotton plantation near the red river, in Louisiana.

At head of title: Twenty-seventh thousand.

Investigations of infra-red spectra ...

Pt. V-VII have title: Supplementary investigations of infra-red spectra.