  Available from: NC State University Archives    20 October,
2000  Nuclear Reactor Digitization Project  R. L. Murray Reactor
Project Notebook  Illustrations have been included from the
print version. Scanned by Russell Koonts with Photoshop 5.0
software. Memorandum from R. L. Murray to Dr. Clifford K. Beck
A. C. Menius, Jr. R. L. Murray  2 pp. Manuscript copy consulted
UA 105.16     Library of Congress Subject Headings 1951 English
LCSH manuscript 24-bit color: 400 dpi Memorandum from R. L.
Murray to Dr. Clifford K. Beck Typescript 2 pp. 1951
MurNBingredients000051  SHIELDING77947294 TO: Dr. Clifford K.
Beck FROM: R. L. Murray CC: A. C. Menius, Newton Underwood  This
note answers your request for calculations on the heavy
concrete.  The composition of Barytes mix, according to the
Carbide purchasing agent is, per yd3, Barytes3970 lb72.0
Colemanite400 lb7.3 Portland cement830 lb15.1 Water310 lb (37.5
gallons)5.6 Total mix5510 lb100.0  Since the Colemanite consists
of B2O344% CaO27% H2O28%  The boron content