Hi Marcus,
This the so-called Buch von den probierten Künsten (on well-tried arts), printed in 1535.
I attached some samples which are of interest in our thread although Helm's original intention was to demonstrate fireworks as a means of merrymaking.
The bottom attachments depicts a notable device quite similar to some presented by Franz Helm; Veste Coburg collections;
and two glass hand grenades for the so-called Greek Fire, 10th-12th c., and a few caltrops; National Historic Museum Athens.
Best,
Michael
Last edited by Matchlock; 18th March 2014 at 11:35 PM.
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