It is notable that those vulgar distillers, who labour at the work of confecting aqua fortis
of various kinds, carefully separate the phlegm from it, since according to their way of thinking this makes the aqua fortis
"If you wish I will also illustrate 'El Filibusterismo,' and if you like, give me a brief subject for propaganda, so that with 10 or 15 drawings in aqua fortis
, a little book can be made in the style of children's stories that are made here, sometimes in the form of caricature, sometimes in more serious style.
The manuscript is full of references to the aquila or eagle (the volatile principle or sal ammoniac), aqua fortis
or "strong water" (mainly nitric acid), aqua vitae (concentrated alcohol, often distilled wine), "dragons," (symbolizing "the volatile and fixed principles [mercury and sulphur]," 253), sophic mercury (describing the universal agent of transmutation) and the urine of Saturn (an ammonium salt), just to name a few.