Product Type
Condition
Binding
Collectible Attributes
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Publication Date: 1918
Seller: Xerxes Fine and Rare Books and Documents, Glen Head, NY, U.S.A.
First Edition
Condition: VG. Berlin. 1918. first edition. One issue of DIE NATURWISSENSCHAFTEN , 20 and 27 September 1918. Heft 38 and 39. Sechster Jahrgang. 4to wraps. Betz - the inventor of the wind tunnel and Betz's Law - article pp. 557-562 with 11 small text figures in 20 September issue and pp.573-578 with 7 text illus in 27 September issue. Issues moderately toned. Previous owner underlined one sentence in the 20 Sept issue. VG. No owner or institution marks. Pair of issues: