_The Reader hath all here in one Volumn which =Glauber= ever Printed, as far as I can find upon diligent Enquiry at =Amsterdam=, where all his Writings were Printed, and where I purchased the Original Copper Plates belonging to them. But whereas, as ’tis said in the =Explication of Miraculum Mundi=, page 177. That the Cut there described was not Printed in the Latin Copies, nor to be found among the Original Plates; yet notwithstanding, I was unwilling that the Work should go without the Figure of so useful a Furnace as that is, for the Torrefying, or Calcining of Ores, and separating, and depurating their Metals, for which reason I have caused it to be Delineated and Printed with others before the =Continuation of Miraculum Mundi=, after page 188. I have also procured from the hand of another Friend, who is a Lover of Art, the Draught of the Refrigeratory, Furnace, or Instrument, which serves for the making the =Mercury of Wine=, purifying, and fixing of =Argent-vive=, =Antimony=, =Sulphur=, &c. and many other uses which an Ingenious Artist will find out. This Furnace the Author always endeavoured to conceal, but describes it in some part in the beginning of the sixth part of the =Spagyrical Dispensatory=, to which Description I have added the Figure. The Figures of the several Vessels and Instruments belonging to the Fifth Part of the Furnaces, are referr’d to at the beginning of the Fourth Part, but since, for the better orders sake I have placed them before the said Fifth Part._ _These Twelve following Treatises were never Printed in =Latin=, but in the =German= Tongue only, =viz.= The =Third=, =Fourth=, and =Fifth Centuries=; the =Second= and =Third Appendixes= to the Seventh Part of the =Spagyrical Dispensatory=. The =Book of Fires.= =Proserpine.= =Elias the Artist.= =The three Fire-stones.= =The Purgatory of Philosophers.= =De Lapide Animali.= =The Secret Fire of Philosophers.= All which I have caused to be Translated (my self being ignorant of the =German= Tongue) by a person well skill’d both in the =High Dutch=, and also in =Chymistry=, whereby I hope this Book will not be altogether unserviceable nor unacceptable even to the Learned; besides, all the Works of this Author that are in Latin are very difficultly (if at all) to be met with at any Book-sellers Shop in =London=, and those that are, at a dear rate: For when I had entered upon this Translation, I was forced to send to =Amsterdam= to have all the =Latin= pieces compleat._