17. Formula concerning the President of the Lime-kilns.

Praepositus Calcis.

'It is a glorious labour to serve the City of Rome. It cannot be doubted that lime (coctilis calx), which is snow-white and lighter than sponge, is useful for the mightiest buildings. In proportion as it is itself disintegrated by the application of fire does it lend strength to walls; a dissolvable rock, a stony softness, a sandy pebble, which burns the best when it is most abundantly watered, without which neither stones are fixed nor the minute particles of sand hardened.

'Therefore we set you, well known for your industry, over the burning and distribution of lime, that there may be plenty of it both for public and private works, and that thereby people may be put in good heart for building. Do this well, and you shall be promoted to greater things.'