¶1The chancellor’s decree, dismissing the complainants’ bill for want of equity, is the *595only matter for examination in this court. No question as to the sufficiency, responsiveness, and effect of the answer, or as to the truth of the bill, is before us. We are simply to inquire, whether the allegations of the bill make a case for equitable jurisdiction. If they do, the decree is erroneous ; if they do not, it is correct. We are, on this appeal, to regard the allegations as truths ; and will, therefore, in this opinion so speak of them.
¶2The complainants have a dam upon a certain stream, directing to their machinery the water which constitutes its propelling power. This dam backs up the water on the land of some of the defendants, but does not cause it to overflow the banks of the stream. A dam, about fifty feet below the present one, was erected by a former proprietor, more than twenty years before the complainants were disturbed in the use of the- water. At a time intermediate between the erection of the latter and the former, another dam was built. The present dam was erected less than ten years before the commencement of this suit; and it is higher by less than six inches than the previous ones. Whether the first two dams, or either of them, backed up the water on the defendants’ land, is not disclosed by the bill. It does not, therefore, affirmatively appear that the natural flow of the stream upon the defendants’ land was interrupted, until the last dam was built. We can not infer, because the last dam extends the influence on the defendants’ land, that therefore the former dams, of less height, and different position, had the same effect. Indeed, we are without the data for an argument upon the subject; for the bill is silent as to the degree of fall in the stream, and as to the extent to which the water is thrown back upon the defendants’ land. We only make out that the present influence reaches the defendants’ premises, from the statement that a ditch upon their land extends into the pond. The disclosure of the bill is, that there has been, by aid of three successive dams, a continuous use of- the stream for propelling machinery; and that this use has, since the erection of the last dam, and for a period less than ten years', *596disturbed the accustomed-flow of the stream upon the defendants’ land.
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¶4It is clear that the complainants do not, by the allegations which we have heretofore noticed, bring themselves within the principle above stated ; for it is not shown that any enjoyment, challenging and adverse to the right of defendants, or those under whom they hold, was exercised until the last dam was erected, within the period often years.
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¶6It seems that the elevation of the water in the canal caused by the present dam, is only three inches greater than that caused by the previous dams ; and it is, perhaps, a reasonable inference, that the increased refluence above the dam can not be much greater. It is argued, that this increase of elevation is so small as to be immaterial, and that the present elevation must be justified by a long continued previous enjoyment of one so slightly smaller. This argument can not be sound. It is not shown that the previous dams caused any refluence upon the defendants’ land. It is impossible that an enjoyment, which did not distui-b any right, could become the predicate of a prescriptive right to throw back the water upon the defendants’ land.
¶7But, even if the bill had shown that the two first dams backed up the stream upon the defendants’ premises, and that the easement had been enjoyed for more than ten years, it would not follow that a right to increase the extent of the refluence, even by so small an additional elevation as three inches, would be acquired. The law does not make it indispensable to the establishment of a prescriptive right, that the mode or manner of using the water should have been precisely the same through the period of prescription. On the contrary, variations in the use, not materially prejudicial to other owners, do not interfere with *598the prescription. — 3 Kent’s Com. 443. But this doctrine has no relation to the question, whether an adverse enjoyment can be increased in its extent, beyond the limits of the use which gives the right by prescription. A right conferred by deed, would be limited by the terms of the grant. — Angell on Waters, 148-149. Certainly, the argument is as strong for a like limitation of the extent of the right acquired by prescription; and we accordingly find that the authorities carefully restrict the easement acquired by prescription to the extent of the user. — Angell on Waters, §§ 224, 225, 226; Style v. Hooker, 7 Cow. 266; Baldwin v. Calkins, 10 Wend. 167 ; Darlington v. Painter, 6 Barr, 473 ; Stein v. Burden, 24 Ala. 130. If the dams which existed ten years before the disturbance alleged in the complainants’ bill, produced a refluence upon the defendants’ land, then there might be a prescriptive right to that extent; but an increase of the refluence, by an additional elevation, within ten years, would be an unauthorized invasion of another’s right.
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¶11No question arises as to a parol license to build the last dam to its present height, for the bill shows that the party who is alleged to have given the present license had no title to the land to be affected.
¶12Reversed and remanded.