LEHMANN, Johann Christian.
Allgemeine oeconomische Holzspahrkunst ... darinnen bey 70 Arten verbesserter Oefen beschrieben .... mehr als die Hälfte Holz erspahret werden könne ... Neue Auflage.
Leipzig, Grotzische Handlung, 1754. 2 parts in 1 volume. 4to. With 10 folding engraved plates with stoves, ovens and chimneys. Contemporary half, tanned sheepskin, with gold-tooled red morocco title-label on spine. [4], 162; 128, [4] pp.
€ 1,000
Second edition of an interesting work on energy-saving heating systems by Johann Christian Lehmann from Leipzig, professor of medicine and physics. The high wood prices and the large quantities necessary for heating prompted Lehmann to improve the construction of stoves in order to save energy. He calculated that his proposal would reduce the fuel costs with two thirds. The first edition was published in 1735 as Utilitatis physicae verae specimen VI : ars lucrandi lignum d.i. Universal-Holtz-Spahr-Kunst.
A few spots on the title-page, otherwise a very good copy; spine slightly rubbed and damaged at the top. Engelmann, Bibliotheca Oeconomica, p. 185; Poggendorf I, col. 1409; cf. Berlin Kat. 3837 (first ed.).
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