This set of six coppers is a series of paintings depicting the various branches of arts and sciences.  One panel depicts a number of allegorical figures, and is the key of the overall conceit: a group of young boys, each with a flame over their head designating them as a "genius" of a particular branch of sciene, are presented by the god Mercury to a group of women at the left.  The goddess of learning, Minerva, stands next to a queen on a throne, and to her right another goddess (probably Ceres, who holds a key) and the personification of Spain, who wears a mural crown and stands next to a lion and a carving bearing the Spanish arms.   The enthroned woman may represent Queen Maria Christina, who had assumed the Regency the previous year (1833) on behalf of her daughter, the three year old Isabella II.  The point of the allegory is♈ clear, that the sciences are to flourish in Spain under the protection of the Olympian deities, but most particularly under that of the Queen.  The other panels focus on each of the different🌞 branches being presented in the first: the genius of botany teaches his students the arts of agriculture; the genius of astronomy guides his pupils, and so on with the genii of geology, chemistry, and zoology. 

Little is known about Julián Verdú. He was recorded as a native of Alcoy in the province of Alicante when he participated in the 1802 concourse of the Real Académia de Belles Artes de San Fernando, Madrid, and his age was given as 22 (thus giving his likely year of birth as 1780).  He participated in the concourse of 1805 as well, and appears to have been made an "Académico de Merito" when he showed a Farewell of Hector and Andromache in 1828.  He continued to work and show, exhibiting a painting of modern Spanish history in 1842 with a Defensa de la Plaza Mayor en la noche del 7 de julio de 1822.