The Harry W. Kelley Drawbridge opened in 1942 and is managed by the Maryland State Highway Administration. The drawbridge, which averages passage of
Appendix Sample Section for A Guide to Astrophotography with DSLR Cameras Stellafane ATM: Sagitta to Focal Length Calculator Stellafane, Home of the Springfield Telescope Makers Inc., Springfield, Vermont, USA, Amatuer Telescope Making AstroGoods: Home AstroGoods Telescope Products: mounts, orion...