56.8 x 36 x 12.5 Carved and inlaid wood, glass and brass
Horizontal optical prism mounted on a stand to permit height adjustment
56.8 x 36 x 12.5 Carved and inlaid wood, glass and brass
's Gravesande, Willem Jacob, Physices Elementa, Leiden, 1742, Tomo II, § 3524, Tab. CXII, Fig. 3. 