Art; Art works; Musicians; Musical instruments; Music; Music festivals; Etching; Engraving; Invitation cards
An etching or engraving of different musicians is on an invitation to the Bessie Bartlett Frankel Festival of Chamber Music, 1972-1973. Crop marks can be seen around the invitation.
A figure explaining a torquetum, a medieval astronomy instrument that takes and converts measurements made in three sets of coordinates: horizon, equatorial, and ecliptic. The text in the figure reads "Figure 2.13. Here is the complete torquetum...