In the tradition of Herbert Highstone, here's another historic refractor. Peter Barlow (namesake of the barlow lens) came up with this design as in his day getting good quality flint in large sizes was difficult, so he substituted flint with a hollow glass lens filled with carbon-disulphide! He built it in 1831.
An interesting read...
http://www.barlowgenealogy.com/england/famous/Petersbio.htm
An interesting read...
http://www.barlowgenealogy.com/england/famous/Petersbio.htm
8)
