After last week’s post on Man Ray’s photographs of equation models from the Institut Poincaré in Paris, here are four illustrations (plus the cover) from the book “Verzeichnis von H. Wieners und P. Treutleins Sammlungen mathematischer Modelle für Hochschulen, höhere Lehranstalten und technische Fachschulen.”
Herman Wiener was a 19th-century German mathematician who created chalk and silk thread models with metallic frames.
The catalog of his work, printed in 1912, can be found online here.
