and by
the by observe many useful products and Phenomena of Nature, to the
great improvement of his Art, and sound Natural Philosophy, which are
not taken notice of by Apothecaries, and their Servants; for all which
they have neither will nor skill.

As to the improvement of Medicines, this may be added, by the
experimenting Physician, that in distill'd waters he will consider and
find which of them will afford any virtue, which only phlegm
equivalent but to Conduit-water, which of them will keep long, and in
perfection, which soon or in what time decay, and spend them
accordingly, and in compound distill'd waters, will find cause to lay
aside many simples as nothing conducing, or rather weakning the
efficacy of the Medicine designed; whereby much charge and trouble
will be spared, and better compositions be made.

He will gain and keep to himself Patients, who have diseases they are
unwilling should be known by Apothecaries and their Boys, and all such
as have a mind to turn over their File.

The Patient will have better opinion of the Medicines, and confidence
in the use or them, and the Physician more satisfied in his
Conscience, and better assured of the success.

He will gain reputation to his Art, by restoring it to its first
institution and practice, by the Founders and Heroes of Physic.

By constantly practised Medicines he will find out a better method of
Cure, and may hereby arrive at the true causes of diseases.

He will observe what Medicines by precipitation or other ways, alter,
destroy, or weaken one another, whereby of good ingredients singly
used, a bad Composition may be made, and therefore fail in the success
expected. Many more things might be here added, which a skillful
observer, and versed in the way to make experiments (no easie matter)
will daily find, and at present I do not so much as give hints of
them, but shall hereafter, as occasion and opportunity require.

He will have more scope to be charitable to the poor, and more civil
and obliging to his friends, by curing them gratis, or at small
charges.

He need not trouble himself with ways of concealing the use of his
Medicines, by setting down no directions in his Bill, but giving them
to the Patient, which the Apothecary soon learns; nor with giving some
of his own Medicines at a pinch, which if they succeed not, to be sure
the Apothecaries will cry down in all places, but will conceal all
eminently good successes, as disadvantage