1-3 of 3 Books
A vertical coelostat telescope
A vertical coelostat telescope
By George Ellery Hale
Siderostatos, helióstatos, celóstatos
Siderostatos, helióstatos, celóstatos
By F. de P. Leite Pinto
The new coelostat and horizontal telescope of the Astrophysical observatory of the Smithsonian Institution
The new coelostat and horizontal telescope of the Astrophysical observatory of the Smithsonian Institution
By C. G. Abbot