Orbits of the double stars, A B of [Epsilon] Hydrae and ? 883, by the graphical method.

Type-written ms.

Submanifolds of dimension n-1 in [epsilon]n̳ with normals satisfying a Lipschitz condition.

"Paper written under Contract Nonr. 58304."

The absorption spectra of solutions of certain salts of cobalt, nickel, copper, iron, chromium, neodymium, praseodymium, and erbium in water, methyl alcohol, ethyl alcohol, and acetone, and in mixtures of water with the other solvents.

"A continuation of the work of Jones and Uhler on the absorption spectra of solutions (Carnegie publication no. 60)" cf. Pref.