The Milkmaid (Vermeer) van Leyden's engraving "The Milkmaid" (1510) and Jacques de Gheyn II's engraving "The Archer and the Milkmaid" (about 1610). Vermeer's painting is even more understated, although the use of symbols remains: one of the Delft tiles at the foot of the wall behind the maid, near the foot warmer, depicts Cupid – which can imply arousal of a woman or simply that while she is working she is daydreaming about a man. Other amorous symbols in the painting include a wide-mouthed jug, often used as a symbol of the female anatomy. The foot warmer was often used by artists as
Delft University of Technology Product Design design method. Cees Dekker's lab at TU Delft demonstrated in 1998 the first transistor made out of single nanotube molecule. Delta Works plan was, in part, a child of TU Delft graduates, including Johan Ringers and Victor de Blocq van Kuffeler. TU Delft was a precursor of Open design concept. In architecture, TU Delft is famous for Traditionalist School in Dutch architecture. TU Delft was a home to many prominent microbiologists including Martinus Beijerinck, who in 1898 discovered viruses while working at TU Delft, and Albert Kluyver, father of comparative microbiology, which resulted in the creation of so-called