Rosicrucian fundamentals : an exposition of the Rosicrucian synthesis of religion, science and philosophy, in fourteen complete instructions
A fourteen-lesson correspondence course in Rosicrucian doctrine written by George Winslow Plummer and issued by the Flame Press in New York in 1920 for students of its occult order. The plates are coarse halftones of astronomical photographs and telescope drawings — sunspot vortices, solar prominences, granulated disks and eclipse rings — usable as grainy black-and-white textures, circular motifs and swirling line studies.
