Which preposition to use with empirics

in Occurrences 3%

Such indeed is the infatuation and credulity of the ignorant that, we are confidently assured, a notorious German quack had within one year so many half-guinea applications that he netted £2000; and that the glass bottles in which the precious nostrums were conveyed from the sanctum sanctorum of the mendacious empiric in high Germany, who made his debut in this country by hawking about Dutch drops, amounted to as many two-pences.

against Occurrences 1%

Simon Pauli tells us, that they have been the grand secret of some empirics against the broad kind of worms called taenia; and that the dose is one, two, or three drams of the powder.

at Occurrences 1%

Experience taught us this: but then experience is only an empiric at the best.

for Occurrences 1%

How many a clever man becomes the dupe of empirics for want of a little science.

OF Occurrences 1%

ON A LATE EMPIRIC OF "BALMY" MEMORY (1802.

Which preposition to use with  empirics