Historical trade-manual evidence. Preserve authorial attribution; not a present-day process.
Do not upgrade description to tested performance or patent priority. Continuous output from alternately charged vessels is not automatically identical to modern continuous feed. The admission limits the book's overall practical-authority claim.
A French system is described through paired stills, a main column, a smaller column, condensers and coordinated charging or routing of streams. Diagrams14–19 show the apparatus and an eprouvette that keeps a hydrometer and thermometer in flowing distillate. Monzert explicitly acknowledges limited personal experience of this system before describing its advertised advantages.
PDF 129
PDF 107
Printed103–125; French system and eprouvette
Paraphrase and locator checked against the supplied PDF; Verified refers to source fidelity, not independent factual or technical validation.
No access / 
Evidence
Paraphrase: A French system is described through paired stills, a main column, a smaller column, condensers and coordinated charging or routing of streams. Diagrams14–19 show the apparatus and an eprouvette that keeps a hydrometer and thermometer in flowing distillate. Monzert explicitly acknowledges limited personal experience of this system before describing its advertised advantages.
Location and context
PDF 107–129. Printed103–125; French system and eprouvette.
Do not upgrade description to tested performance or patent priority. Continuous output from alternately charged vessels is not automatically identical to modern continuous feed. The admission limits the book's overall practical-authority claim.
Annotation
Historical evidence, with attribution retained. Citation:
Verification checklist
Verified means source fidelity, not endorsement of historical chemistry or instructions.