Victorian Black Glass Artificial Horizon Set by John Lilley & Son London Antique Razor Set Owing to the different materials

Owing to the different materials of the rollers

5 inch telescope with attached glass level below

The plate is accompanied by a large brass spirit level with a flattened base so that it can be rested upon the plate to assist the use in creating a level platform for navigational observations

discussing the various efforts to expand the scale

and describes the method of construction

Victorian Black Glass Artificial Horizon Set by John Lilley & Son London Antique Razor Set Owing to the different materialsFor sale, an exquisite maritime black glass artificial horizon set by John Lilley & Son, London The base of the instrument takes the form of a brass rectangular tray which is inset with a mirror finished black glass plate with bevelled edge. The plate three pointed feet which are clamped to each side and screw threaded in order that they can be adjusted to a level position. The plate is accompanied by a large brass spirit level with a flattened base