Electricity · Magnetism · Science · History · Technology · Electricity -- Early works to 1800 · Electricity -- Early works to 1850 · Magnetism -- Early works to 1800 · Science -- History · Technology -- History
Internet Archive · Smithsonian Libraries and Archives · Public domain (published before 1931). Free to use for anything.
![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-300-463.webp)
