Luce vita (1 Ergebnisse)

Soft cover. Zustand: Very Good. 18 p. : ill. ; 28 cm. ; LC: TH7145; Dewey: 641.588 ; OCLC: 3713975 ; paper wrappers, in reinforced velo binding ; ex-lib, stamps, label, date due, pocket ; "The VITAS Solar Cooker was especially designed to be sturdy, relatively easy to make, easy t o repair, and low in cost. it uses the principle of the Fresnel reflector which concentrates light and heat by using several simple reflecting surfaces.The Vita Solar Cooker requires more labor than, for example, forming a parabolical reflector by spinning an aluminum sheet; the labor requirement may make it uneconomical for developed countries, but this cooker was designed especially for developing ones." ; pull-out plan for cross-beams in pocket at back ; VG. Book.…