## Monday, November 25, 2019

### Expressing Logarithms in Points of Royal Feet

Assorted retorts from yahoo boards and elsewhere : Medieval Quadrivium and Logarithms (quora) · Φιλολoγικά/Philologica : Expressing Logarithms in Points of Royal Feet · Previous Work on Logarithms · Yes, My Method Can Close In on Logarithms

As you may know, the English foot is 12 inches which are 144 lines. The French Royal Foot, which was exchanged for the metre system, is by contrast one more subdivision, namely 1728 points.

Here is a logarithmic table where 1000 points = 1.000000 in the normal logarithms, and if you correctly subdivide the foot (even an English one) you will get a functional slide rule./HGL

0.1 0.2 0.3 0.4 0.5 Origo 301 2 inches 1 line 1 point 477 3 inches 6 lines 9 points 602 4 inches 2 lines 2 points 699 4 inches 10 lines 3 points 778 5 inches 4 lines 10 points 791 5 inches 5 lines 11 points 845 5 inches 10 lines 5 points 903 6 inches 3 lines 3 points 954 6 inches 7 lines 6 points 1000 6 inches 11 lines 4 points 1041 7 inches 2 lines 9 points 1079 7 inches 5 lines 11 points 1114 7 inches 8 lines 10 points 1146 7 inches 11 lines 6 points 1176 8 inches 2 lines 1204 8 inches 4 lines 4 points 1209 8 inches 4 lines 9 points 1230 8 inches 6 lines 6 points 1255 8 inches 8 lines 7 points 1279 8 inches 10 lines 7 points 1301 9 inches 5 points 1477 10 inches 3 lines 1 point 1497 10 inches 4 lines 9 points 1602 11 inches 1 line 6 points 1699 11 inches 9 lines 7 points 1778 1 foot 4 lines 2 points 1845 1 foot 11 lines 9 points 1903 1 foot 1 inch 2 lines 7 points 1954 1 foot 1 inch 5 lines 2 points 2000 1 foot 1 inch 10 lines 8 points 2041 1 foot 2 inches 2 lines 1 point 2079 1 foot 2 inches 5 lines 3 points 2114 1 foot 2 inches 8 lines 2 points 2146 1 foot 2 inches 10 lines 10 points 2176 1 foot 3 inches 1 line 4 points 2204 1 foot 3 inches 3 lines 8 points 2230 1 foot 3 inches 5 lines 10 points 2255 1 foot 3 inches 7 lines 11 points 2279 1 foot 3 inches 11 lines 11 points 2301 1 foot 3 inches 11 lines 9 points 2477 1 foot 5 inches 2 lines 5 points 2602 1 foot 6 inches 10 lines 2699 1 foot 6 inches 8 lines 11 points 2778 1 foot 7 inches 3 lines 6 points 2845 1 foot 7 inches 9 lines 1 point 2903 1 foot 8 inches 1 line, 11 points 2954 1 foot 8 inches 6 lines 2 points 3000 1 foot 8 inches 10 lines 3041 1 foot 9 inches 1 lines 5 points 3079 1 foot 9 inches 4 lines 7 points 3114 1 foot 9 inches 5 lines 10 points 3146 1 foot 9 inches 10 lines 2 points 3176 1 foot 9 inches 11 lines 3204 1 foot 10 inches 3 lines 3230 1 foot 10 inches 5 lines 2 points 3255 1 foot 10 inches 7 lines 3 points 3279 1 foot 10 inches 9 lines 3 points 3301 1 foot 10 inches 11 lines 1 point 3477 2 feet 1 line 9 points 3602 2 feet 1 inch 2 points 3699 2 feet 1 inch 8 lines 3 points 3778 2 feet 2 inches 2 lines 10 points 3845 2 feet 2 inches 8 lines 5 points 3903 2 feet 3 inches 1 line 3 points 3954 2 feet 3 inches 5 lines 6 points 4000 2 feet 3 inches 9 lines 3 points