Quotes:Centrum naturae concentratum

Zirkoff, Boris

Alipili. This is most likely a pseudonym, and the only work known under that name is: Centrum naturae concentratum: or, the salt of nature regenerated. Improperly called the philosopher’s stone. Written in Arabik by A., a Mauritanian, published in Low Dutch, and now done into English (by E. Price). London, 1696, 12°. It may be consulted in the British Museum (1033.d. 18.4.).

Source: Boris de Zirkoff, «H. P. Blavatsky Collected Writings», vol. 11, p. 563