Letter from E. R. Thompson, Jr. to Mrs. Harris L. Kempner discussing about a form that must be completed to correctly report to the government about the payments for this year. And, it goes on talking about if Ruth has an identification number.

Letter from Isaac H. Kempner to Mr. and Mrs. Erich Goldberger thanking for the good wishes and informs that they are not sending formal cards.

Nineteen papers presented at the Conference on the Transport of Radionuclides in Fresh Water Systems are given. Separate abstracts were prepared for 18 papers; one was previously abstracted for NSA. (M.C.G.)

Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Hugh F. McKenna, Baltimore."

Letter from I. H. Kempner to Mrs. Westheimer expressing his thanks for her thoughtful well wishes on his birthday.

Letter from Isaac H. Kempner to Mr. and Mrs. Goldberger thanking them for their greetings for his 90th birthday.

From American Chemical Society 145th National Meeting, New York, Sept. 1963. The pyrolysis of diborane was examined using a chemical shock tube as a reactor. Additional evidence for the existence of hexaborane-12 and heptaborane- 11 and -13 was obtained. The presence of a large net normal isotope effect in the formation of tetraborane and hexaborane and a net inverse isotope effect in the formation of pentaborane-9 are observed. A mechanism, consisting of a series of competitive reactions and eqailibria, in which tetraboraue is the precursor of pentaborane-11 and hexaborane but not of pentaborane-9 is shown to be compatible with the observed isotope effect. Data obtained by examining the pyrolysis of various mixtures of boron hydrides are also consistent with the mechanism. (auth)