he hath seen the effect of them, unless it be such as he makes
himself, nor those neither till he hath made some tryal of them.

He will much inlarge Materia Medica, Chymistry and Pharmacy, and
discover the grounds of them, and wherein the efficacy of remedies
lyes, and thereby lay open a whole Ocean for new discoveries, 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