XXVI. Notice of the fusion of plumbago, or graphite, (commonly called black lead,) in a letter from Professor Silliman to ProfessorRobert Hare, M.D. Dated March 26, 1823

1823 The Philosophical Magazine  
doi:10.1080/14786442308644393 fatcat:rpltnmibojfclf2mjmn4r5ziju