Antique Sections of a Sphere Wooden Blocks Set in Finger Jointed Slide Top Box art glass There is a bit of

There is a bit of hairline cracking on two adjacent sides

I just like it as an object

and used to survey Canada's northern waters

Solid brass (I believe brass rather than bronze)

Antique Sections of a Sphere Wooden Blocks Set in Finger Jointed Slide Top Box art glass There is a bit ofI recently found a couple of c. 1900 Milton Bradley Kindergarten Blocks sets designed by Friedrich Froebel, which the box and the blocks on this set remind me very much of. I have not been able to find another set like this one out there, which I assume were made to teach the concept of fractions, with five slots in the box corresponding to five sets of blocks, dividing a sphere into 2 then 3, 4, 5 and 6 sections. I can't say for sure that these were