Polish nobleman (coat-of-arms "Ostoja") from a family settled
in Grand Duchy of Lithuania, military engineer and artillery specialist
under Kings Wladyslaw IV
and Jan II Kazimierz of Poland.
Educated in part in the Netherlands, where he was sent by the King
Wladyslaw IV to serve in the army of Duke Frederick-Henry
of Oran during the war with Spain. From 1648 he served as Second in Command
of Polish Royal Artillery, as an expert in the field of artillery
You can find more information on Siemienowicz in a story
by Tadeusz Nowak "Kazimierz Siemienowicz, ca.1600-ca.1651"
(in Polish), MON Press, Warsaw 1969, and in a preface
to the Polish translation of his work (Warsaw 1963).
- Publication of his fundamental work
Magnae Artilleriae pars prima"
("Great Art of Artillery, the First Part")
in Amsterdam (translations to: French 1651, German 1676, English
and Dutch 1729, Polish 1963). It was used in Europe as a basic
artillery manual for almost 200 years. The book contains a large
chapter on construction, production and properties of rockets
(for both military and civil purposes), including multi-stage rockets
(see the figure), batteries of rockets,
and rockets with delta-shaped stabilizers
(instead of the common guiding rods). The manuscript of
the second part was lost, together with its author, in obscure
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