for the large-scale separations and the mechanical analyses; and to L. F. Rader, Jr., of the Fertilizer Technology Division, for assistance in the chemical analyses. The samples of phosphate rock were kindly furnished by several of the phosphate mining companies.

No abstract

Under the present experimental conditions, the Ladenburg rearrangement does not take place to an appreciable extent. A rather unsatisfactory explanation is given for the fact that the total reaction appears to proceed to an extent greater than 100%. Rearrangement of f-butyl to -butyl bromide appears to take place during the course of the reaction and this probably accounts for the anomalous behavior of f-butyl bromide.

No abstract

paint has been obtained these superior qualities may have been due largely to the type of vehicle used.