Direct radiography of the placenta.

"Clilan (C.B.) Powell, longtime owner of the Amsterdam News, was born in 1894 to former Virginia slaves.  Very little is known about his childhood.  He received his medical degree in 1920 from Howard University School of Medicine and began his career specializing in x-ray technology.   Powell was the first African American x-ray specialist and owned a laboratory in Harlem.  It was at his lab where he met Dr. Philip H.M. Savory, his future business partner.  The two physicians collaborated to create the Powell-Savory Corporation in 1935.

With this new corporation, they switched their focus from medicine to business, and became two of the leading African American entrepreneurs in the 1930s.  They first purchased the failing Victory Life Insurance Company in 1933 in Chicago, Illinois and revived it to a thriving business.  In 1935 they purchased the Amsterdam News, the largest newspaper in Harlem, for $5,000.  Powell became publisher of the New York paper and retained that post until its sale in 1971.  Powell studied other successful newspapers including the New York Times and patterned the Amsterdam News after them.   He also made the Amsterdam News home for numerous African American journalists such as Earl Brown, Thomas Watkins, James L. Hicks, and Jesse H. Walker.  Powell expanded the paper’s coverage to include national and international news...." (blackpast.org article on C. B. Powell, accessed 5-2020).