The earliest demonstration of the placental passage of morphine? / by D.B. Jack and S.J. Laugher.

1982

pages 7-8

"Taken, in part, from a paper given at the Spring Conference [of the British Society for the History of Pharmacy], University of Warwick, April 2-4, 1982"

Makes the case for Eduard Marquis (b. 1868) having first demonstrated the placental passage of morphine