The Alchemy web site on
Texts primarily dealing with allegorical, philosophical and spiritual alchemy:

16th Century and earlier:
The words of Father Aristeus to his son
Simon Forman - Of the Division of Chaos
An Alchemical Mass
Alchemy in the English State Papers
The Golden Tractate of Hermes
Alchemical Catechism of Baron Tschoudy
The Mirror of Alchemy - Roger Bacon
Bloomfield's Blossoms
The practise of Mary the Prophetess in the Alchymicall Art
An Alchemical poem by Thomas Rawlin
Summary of the Rosary of Arnold de Villa Nova
Pontanus - Epistle on the mineral fire
The Ripley Scroll
The Turba philosophorum
Marsilio Ficino on the alchemical art
Pontanus - The Secret Fire
Paracelsus - The Book Concerning the Tincture of the Philosophers
Paracelsus - The Aurora of the philosophers
Petrus Bonus A form and method of perfecting base metals

17th Century:
Aula lucis, or, The House of Light by Thomas Vaughan
Steganographick Collection from Le Tableau des Riches Inventions
Oswald Croll Preface of Signatures
Extract from Glauber's Short Book of Dialogues
Khunrath's Natural Symbolum or short confession
The names of the Philosophers' Stone by William Gratacolle
Michael Maier's Atalanta Fugiens
Extract from Alchymie et le Songe Verde
A 17th century allegorical alchemical poem by Edmund Dickinson
153 Chymical aphorisms of F.M. van Helmont.
157 Phylosophick Canons
The Book of Lambspring
Edward Kelly's Theatre of Terrestrial Astronomy
Edward Kelly's The Stone of the Philosophers
The Light coming out of darkness - Crasselame
Everard's translation of the Corpus Hermeticum
Verse on the Threefold Sophic Fire
The Tomb of Semiramis
On the Philosophers' Stone
Valentine Weigel - Astrology Theologized
Thomas Vaughan - Coelum Terrae
The Iconologia of Cesare Ripa
Introduction to the Iconologia of Cesare Ripa
The War of the Knights
Robert Fludd's Mosaical Philosophy
[extract] The Hermetic Triumph
An anonymous treatise on the Philosophers' stone
Jean Albert Belin - The Adventures of an Unknown Philosopher
Ruland - On the Prima Materia
The letter of a philosopher concerning the secret of the great work
The Natural round Physick or Philosophy of the Alchymical Cabalistical Vision
An hundred aphorisms containing the whole body of magic from Ms. Sloane 1321
Certain Verses of an Unknown Writerfrom Benedict Figulus
A Short Enquiry concerning the Hermetic Art
The Hermetic Arcanum
Limojon Saint-Didier's Letter to the True Disciples of Hermes
The Glory of Light
Place in Space

18th Century and later:
Two prayers for alchemists by Eckartshausen
Freher's Process in the Philosophical Work
R.W. Councell Apollogia Alchymiae
The Philadelphian Gold
The Hermaphrodite child of the Son and Moon

If you have problems understanding these alchemical texts, Adam McLean now provides a study course entitled How to read alchemical texts : a guide for the perplexed.
Alchemical texts

16th Century
Practical alchemy
Philosophical alchemy

17th Century
Practical alchemy
Philosophical alchemy

18th Century
Practical alchemy
Philosophical alchemy

Alchemical poetry

Alchemical allegories

Works of Nicolas Flamel
Works of George Ripley
Works of Sendivogius
Theatrum Chemicum Britannicum
Emerald tablet of Hermes
Rosicrucian texts
Literary works
Texts from Musaeum Hermeticum

Spanish alchemical texts
German alchemical texts
French alchemical texts
Russian alchemical texts
Italian alchemical texts