64 Pa. Stat. § 138
In making any survey by any deputy surveyor, he shall not go out of his proper district to perform the same, and that every survey made by any deputy surveyor without his proper district shall be void and of non effect; and the surveyor general, and his deputies are hereby severally directed and enjoined to survey, or cause to be surveyed, the full amount of land contained and mentioned in any warrant, in one entire tract, if the same can be found, in such manner and form, as that such tract shall not contain in front, on any navigable river or lake, more than one-half of the length or depth of such tract, and to conform the lines of every survey in such manner as to form the figure or plot thereof, as nearly as circumstances will admit, to an oblong whose length shall not be greater than twice the breadth thereof, and in case any such survey should be found to contain a greater quantity of land than is mentioned in the warrant on which it shall be made, so that such excess be not more than one-tenth of the number of acres mentioned in such warrant, besides the usual allowance for roads and highways, the return thereof shall nevertheless be admitted under the warrant, provided the party procuring such return to be made shall forthwith pay to the receiver general of the land office the price or value of such excess or over-plus land, at the same rate at which he paid for the land mentioned in the warrant.
64 P.S. § 138