Costing the removal of a cylindrical mass of rock
Bulk reckoned at 3000 canne; dragging and breaking priced at 214 2/7 ducats
The transcribed note reckons the bulk of a cylindrical body of stone — 30 canne in diameter, 100 in circumference and 4 canne high — as 3000 canne, obtained by multiplying half the circumference by half the diameter (750) and then by the height. From this it subtracts a wedge equal to one third of the body (about 1000 canne) and prices the dragging and breaking-up of the remaining stone at 30 soldi the canna, i.e. 1500 lire or 214 2/7 ducats, leaving the hump that runs along the shore. Figures such as 20, 10, 17 1/3 and 12 2/3 are jotted around the diagram. The upper half of the sheet carries faint red-chalk profiles of hilly terrain crossed by straight sighting lines and a small solid figure, and further light untranscribed notes appear at the lower left.
On this page
Bulk of the cylinder and cost of removing the stone
Half the circumference (100) times half the diameter (30) gives 750; multiplied by the height of 4 canne this yields 3000 canne. The larger wedge, one third of the cylindrical body, is about 1000 canne, whose dragging and breaking-up at 30 soldi the canna comes to 1500 lire, that is 214 2/7 ducats; there remains the hump lying along the shore.
Figures noted around the diagram
The numbers 20, 10, 17 1/3 and 12 2/3 are set down around the drawn figure at the top of the sheet, apparently the measured dimensions used in the reckoning.
Profiles of hilly terrain with sighting lines
Across the upper half, red-chalk silhouettes of hills or mountains are cut by straight lines running to points, as in the survey of a site; a small pyramidal solid sits at the left. No transcription accompanies these sketches.