Drawing of High Pressure Engine proposed by Jacob Leupold, 1724, prepared in the Museum, 1897. High pressure engine proposed by Jacob Leupold
Photograph showing types of spur wheel teeth from J. Leupold's "Theatrum Machinarum Generale", 1724 Photograph showing types of spur wheel teeth from J. Leupold's "Theatrum Machinarum Generale"
