Water clocks and a meditation on measuring time

A clock of lead pressing a leather air-bag

A weight of lead, pressing and squeezing a leather bag full of air, is proposed to show the hours as it descends.

Meditation: that our wretched days not pass in vain

We lack neither methods nor ways to divide and measure these our wretched days, which we should rather take pleasure in not spending or letting pass in vain, without any praise and without leaving of themselves any memory in the minds of mortals.

A portable water clock, a quarter-braccio long

This is a water clock in which each mark is one hour; it is good for travelling, shows the hours exactly each time it is weighted, and need only be a quarter of a braccio long.

Graduating the clock vessel into 24 parts

Divide the lower vessel into 24 parts so that, when water is poured in, the larger upper vessel does not fill higher than the first mark within the space of one hour.

Quicksilver distilled through an alembic

Beside an alembic, a note requires quicksilver distilled through the still.

A memorandum of people and a quadrant

Turned sideways at the foot is a list of persons, including the quadrant of Carlo Marmocchi, Messer Francesco the herald, Maestro Pagolo the physician, Domenico di Michelino and Messer Giovanni Argiropolo.

In alto, figura con:

A destra della stessa figura:

A sinistra verso il basso. Figura di alambicco:

Sul margine ma con riferimento alla figura di oriolo:

Accanto alla figura di un oriolo:

In basso girando il foglio:

Al centro, dentro e sotto la figura di un cerchio:

Più in basso:

At the top, a figure with:

To the right of the same figure:

At the lower left. Figure of an alembic:

In the margin, but referring to the figure of the clock:

Beside the figure of a clock:

At the foot, turning the sheet:

At the centre, inside and below the figure of a circle:

Lower down: