Text this: Table of natural logarithms ... / Prepared by the Federal works agency, Work projects administration for the city of New York as a report of Official project no. 765-97-3-10. Arnold N. Lowan, PH. D., technical director. Conducted under the sponsorship of the National bureau of standards. Lyman J. Briggs, director, National bureau of standards, official sponsor. Brehon Somervell, administrator, Work project administration for the city of New York.