In 1828 he produced armillary sphere illustrating the heliocentric model of the geocentric i. The device and its use has created treatise Anweisung zum Gebrauch dieser Ringkugel (armillary-Sphäre).
For the device and its use, he created treatise "Anweisung zum Gebrauch dieser Ringkugel" (armillary-Sphäre). In 1828 he produced armillary sphere illustrating the heliocentric model.
In 1828 he produced armillary sphere illustrating the heliocentric model. For the device and its use, he created treatise "Anweisung zum Gebrauch dieser Ringkugel" (armillary-Sphäre).
In 1828 he produced armillary sphere illustrating the heliocentric model. For the device and its use, he created treatise "Anweisung zum Gebrauch dieser Ringkugel" (armillary-Sphäre).