EditorialModel of a Two-Blade Parabolic Propeller, Model of a two-blade parabolic propeller in a frame on a floorboard. The pressure surface of the propeller blades is curved in the form of a parabola. The screw probably does not belong in this frame, which can...
EditorialModel of an Oscillating Steam Engine, Sketch model of the transmission of the movement of two oscillating cylinders on the shaft, mounted on an upright shelf. The shaft is set in motion with a crank on the rear of the board, so that the pistons and two...
EditorialModel of a Two-Blade Parabolic Propeller, Model of a two-blade parabolic propeller in a frame on a floorboard. The pressure surface of the propeller blades is curved in the form of a parabola. The screw can be turned with a crank. The model has a pitch...
EditorialCalculus, Fig. 1: Subtangent and subnormal of the parabola, Fig. 2: Subtangent and subnormal of the hyperbola, Fig. 3: Subtangent and subnormal of the ellipse, Fig. 4: Subtangent and subnormal of the circle, Fig. 6: Content of a circle sector, determin...
EditorialEquations for Geometric Languages, Fig. 1: Equation for geometrical functions on the parabola, Fig. 2: Equation for geometrical functions at the hyperbola about its axis, Fig. 3: Equation for geometrical functions at the hyperbola between asymptotes, F...
EditorialAlfonso Daniel Rodriguez Castelao (1886-1950). Spanish novelist, engraver and illustrator in Galician language. Como na parabola de Pieter Brueghel (As in the parable of Pieter Brueghel), 1941. Museum of Pontevedra. Galicia. Spain.
EditorialAlfonso Daniel Rodriguez Castelao (1886-1950). Spanish novelist, engraver and illustrator in Galician language. Como na parabola de Pieter Brueghel (As in the parable of Pieter Brueghel), 1941. Museum of Pontevedra. Galicia. Spain.