The third Error is one which Sir Thomas Brown has taken Notice of; and it must be acknowledged, that the inserting of it here was a Mistake. However, we hope that it will be excused, since it is seven Years since the Author of this little Pamphlet had the Pleasure of reading _a Part_ of Dr. Brown's Vulgar Errors, and then he did not see that Error; it being not regularly placed among the others, but in a separate Detachment from the main Body. Notwithstanding the general Perspicuity of this Author, we are apt to think that he never heard a Bittern himself, but only went by Hearsay with respect to the Noise which is made by that Bird, however skilled he shews himself in the Anatomy of it. He says, that it differs but little from the croaking of a Raven. We can assure the Reader, that neither the Noise it makes when it draws in the Air, nor the Sound it gives when it throws it out again, have the least Resemblance to the Croaking of a Raven, as he calls it. A Raven makes a much shriller Noise than any of the Crow Kind, notwithstanding it is a larger Bird. I make no Doubt but the Voice of a Raven is twelve or thirteen Notes higher than the Voice of a Rook; besides, he makes his Notes quick and sharp one after another; whereas a Bittern takes near five Seconds between every Sound, and (as will be affirmed) in as deep a Note as the fourth String of a double Bass. * * * * * ERROR I. _That the more Ammunition is put into a Fowling Piece, the farther it will do Execution._ This Error is often of very dangerous and dreadful Consequence; I have known People so obstinate in it, that even ocular Demonstration would not convince them of their Mistake. It proceeds from a Notion, that the more a Gun recoils, the better and stronger will be the Force with which the Shot fly out. There is nothing which requires more Nicety and Exactness than the finding out the proper Charge of a Gun; it is something similar to finding out the Tone of a musical Instrument; of which more in its Place.