Dot Porter, Curator, Digital Research Services at the University of Pennsylvania Library, offers a video orientation to Penn Library’s LJS 251, Ars artium: sive ars magna cabalistica. This manuscript was written by Hartmann Schopper in Germany, between 1655 and 1699, in Latin, with some Hebrew characters. It is a 17th-century copy of a 16th-century treatise (1564, p. 6; 1569, p. 121) on cabalistic gematria (the mystical interpretation of language), in which strings of letters, in this case Latin sentences, are assigned a numerical value.
You can see the full online facsimile of this work in Penn in Hand and you can download all of the images and metadata from OPenn. You can also download a copy of this video from ScholarlyCommons, the University of Pennsylvania’s open access institutional repository.