Charles Holtzapffel

Charles was the son of John Jacob Holtzapffel, originally from Alsace[3] who set up a tool-making partnership in Long Acre with Franic Rousset in 1793.

He also invented machinery for printing banknotes, lathes for cutting rosettes, and equipment for tracing shapes on glass[7][9] and introduced a new system of measures based on the decimal sub-division of the standard inch, as a replacement for the method of measuring with gauges.

All 5 volumes are held by the Science Museum, London,[20] There is some evidence to suggest that Francis Ronalds assisted Charles in the early stages of preparing the treatise.

Typeset sections survive of an unfinished "Turner's Manual" that Ronalds wrote in 1837 and there is marked similarity in the two prefaces and elsewhere.

[21] Charles also published a number of other books and pamphlets,[22][23][24] including one on printing apparatus, which is held by the Wellcome collection.