This novel telescope design - with an axis aligned to the earth's spin axis - was developed and improved, resulting in the solar telescope behemoths of today. The McMath-Pierce solar telescope, with a focal length of 82-m, at the US National Solar Observatory at Kitt Peak, Arizona, is a good example of this general design. You can find the latest solar images obtained by this telescope here.
| Sketch from Grubb's
|Grubb also build an ingenius
5 prism spectrometer to be
fixed to the top of the telescope
| McMath-Pierce solar