- Silbermann's great organ in Strasburg minster (1713-1716), the pitch of which, taken in 1880 and reduced to J9° Fahr.
- Strasburg was French territory in 1713, but Silbermann's organ is not quite a whole tone below.
- Silbermann's 18th-century Dresden pitch, a' 415, and the organs of Renatus Harris, a' 428.7.
- Silbermann's heliostat reflects the rays in any direction.
- - Silbermann's Heliostat.