This part of optics, when well understood, shows us how we may make things a very long distance off appear as if placed very close, and large near things appear very small, and how we may make small things placed at a distance appear any size we want, so that it may be possible for us to read the smallest letters at incredible distances, or to count sand, or seed, or any sort or minute objects.

Command those that govern your house before all you household that they keep careful watch that all your household, within and without, be faithful, painstaking, chaste, clean, honest and profitable.

Command that in no way there be in your household any who make strife, discord or divisions in the hostel, but all shall be of one accord, of one will as of one heart and one soul.

If you know how many acres you have sown of each kind of corn, inquire how much the acre the soil of that land takes for sowing, and count the number of quarters of seed, and you shall know the return of seed, and what ought to be over.

This part of optics, when well understood, shows us how we may make things a very long distance off appear as if placed very close, and large near things appear very small, and how we may make small things placed at a distance appear any size we want, so that it may be possible for us to read the smallest letters at incredible distances, or to count sand, or seed, or any sort or minute objects.

And with the money from your corn, from your rents, and from the issues of pleas in your courts, and from your stock, arrange the expenses of your kitchen and your wines and your wardrobe and the wages of servants, and subtract your stock.

And in doing this I advise you to send to the best manors of your lands those of your household in whom you place most confidence to be present in August at the leading of the corn, and to guard it as aforesaid.