This podcast is from an article in the Rosicrucian Digest written by Dennis William Hauck. The entire article is read by a volunteer, and it features two meditations used by the alchemists in the Middle Ages and Renaissance. You can download the print article (pdf)  from the link below:

 

https://77a5ba0729622e5e80ac-c808e8d6f5a119605d9b0e3ef89bbea9.ssl.cf5.rackcdn.com/Searching_for_the_Cosmic_Quintessence.pdf