| No | RADIUS OF PERIPHERY | RADIUS OF CURVATURE | CO-ORDINATES TO CENTRES OF CURVATURE | |
|---|---|---|---|---|
| x | y | |||
| 1 | 140.00 | 483.50 | 454.79 | 00.00 |
| 2 | 208.15 | 543.60 | 488.55 | 13.08 |
| 3 | 262.40 | 598.62 | 513.38 | 31.72 |
| 4 | 309.20 | 659.77 | 540.71 | 57.00 |
| 5 | 350.50 | 719.84 | 565.27 | 84.86 |
| 6 | 387.44 | 779.48 | 588.00 | 114.93 |
| 7 | 422.23 | 846.45 | 614.35 | 151.50 |
| 8 | 456.23 | 911.30 | 636.90 | 189.55 |
| 9 | 490.00 | 980.30 | 660.11 | 250.17 |
| 10 | 523.33 | 1057.70 | 683.41 | 280.60 |
| 11 | 553.33 | 1136.01 | 712.79 | 328.00 |
PLATE XIII
G. H. Slight Delt. Engd. by W. & A. K. Johnston Edinr.
Stevenson’s Account of Skerryvore Lighthouse.
REVOLVING
DIOPTRIC APPARATUS
FIRST ORDER.
ONE TWENTIETH OF FULL SIZE.
PLATE XIV.
Stevenson’s Account of Skerryvore Lighthouse.
G. Aikman, Sculpt.