Description : Consist of a wooden base 1.1 meter x 95 mm fitted with a
one meter wooden scale divided in millimeters and figured
every centimeter, fixed along the front edge and complete
with following accessories -1
Candle holder.
1 Needle mounted vertically in short wooden rod in the
centre of a wooden base 75x50 mm.
4 Lens holders, each comprising a wooden upright with a ‘V’
shaped slot to hold lenses up to 75 mm diameter, mounted
on a wooden base size 75x50 mm with an index line at the
end.
1 Wooden screen 150x75 mm with an aperture on wooden
base.
1 Translucent mirror 150x75 mm in a wooden frame and
base.
1 Screen of steel mesh 150x75 mm in wooden frame and
base.
