You may know them best for their original use in lighthouses, where they're famously recognised as "the invention that saved a million ships". Or perhaps you initially think of their employment in ...
Point Sur Lightstation is getting its original First-Order Fresnel lens back.The United States Coast Guard signed off on returning the 1887 Fresnel back to Point Sur on Monday and the work to get it ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback