“Elementals” by Franz Hartmann is just the Title of a Spanish Book translated from the chapter “Pneumatology” of his book:

THE LIFE OF PHILIPPUS THEOPHRASTUS BOMBAST
OF HOHENHEIM
KNOWN BY THE NAME OF
PARACELSUS
AND
THE SUBSTANCE OF HIS TEACHINGS
CONCERNING COSMOLOGY, ANTHROPOLOGY, PNEUMATOLOGY [“Elementals”] , MAGIC
AND SORCKRV, MEDICINE, ALCHEMY AND ASTROLOGY,
PHILOSOPHY AND THEOSOPHY
EXTRACTED AND TRANSLATED FROM HIS RARE AND EXTENSIVE WORKS
AND FROM SOME UNPUBLISHED MANUSCRIPTS
by
FRANZ HARTMANN, M.D.

Paracelsus is a Resurrected Master and many of his manuscripts are in Franz Hartmann’s book, this is why it is worthwhile to read it; yet, bear in mind - the warning of Master Samael Aun Weor - that Franz Hartmann's comments are filled with grave errors!