Eidograph, by Alexander Adie; in mahogany box 2'11 1/4" x 7 1/4" x 4", middle bar divided and numbered 0 to 70 each way; arms 70 one way, and 80 the other Eidograph, by Alexander Adie; in mahogany box 2'11 1/4" x 7 1/4" x 4" 1823-1834