36 x 24 x 21 Sculpted wood and iron
Flat metallic mirror with adjustable direction
36 x 24 x 21 Sculpted wood and iron
Carvalho, Rómulo de, História do Gabinete de Física da Universidade de Coimbra, Universidade de Coimbra, Biblioteca Geral, Coimbra, 1978, pp. 516-517.
's Gravesande, Willem Jacob, Physices Elementa, Leiden, 1742, Tomo II, § 3524, Tab. CXV, Fig. 2.