Note 35 — APPENDIX. CALCULATING INSTRUMENTS.
Reading edition
The following is a list of the multipliers for converting the planimeter readings to square feet for any required scale:—
1/16-in. scale = 256 5/16-in. scale = 10·24 1-in. scale = 1·00
⅛-in. do. = 64 ⅜-in. do. = 7·11 1½-in. do. = ·44
3/16-in. do. = 28·44 ½-in. do. = 4·00 3-in. do. = ·111
¼-in. do. = 16 ¾-in. do. = 1·77