Opinion op the court by
JUDGE O’REARReversing.
In 1897, the city of Paducah, having bought about 20 acres of land about three miles from its corporate limits, located and established a hospital upon it for the purpose *365of treating eruptive diseases. The property acquired by the city lies on the east side of appellee’s farm. The hospital on this tract is about 250 yards from the fence of appellee, and about one-half mile from his residence. After the establishment of this hospital, and after ix bad been maintained by the city for some two or three years, appellee brought this action to recover of appellant damages sustained to his farm by reason of the location and maintenance of the pest house. The hospital was established principally for the treatment of smallpox patients. It was the claim of the appellee that the locating of this, pest house in such close proximity to his farm and to his residence tended to so impair their value. — that is. their market value either for selling or renting purposes — as to practically diminish it by half. He asserted that his, farm of 325 acres was worth $20,000. The proof introduced on his behalf shows that it was worth from $5,000 to $20,000, it taking a wide range according to the opinion of the various witnesses. The trial resulted in a verdict and judgment for appellee against the city for $2,500 damages.
Various grounds are urged here with much earnestness, and force why the judgment should be reversed. We will state and dispose of them in the order of their importance.. It is argued on behalf of the city that, inasmuch as it is required by the statute law of the State and by existing-conditions to establish and maintain a hospital, which, under the mandate of the statute, it is compelled to establish within not less than one mile of the limits of an incorporated town or city, it can not be mulcted for having performed this duty, unless it has done so in a negligent or unskillful manner; that, having used care in the establishment of its hospital, it can not be liable to appellee, unless in the matter of the managing or conduct of the hospital,, *366it be done negligently, and thereby damages ensue to him. It is contended that the action of establishing and maintaining a pest house or other1 hospital is a governmental function, which the courts will not interfere with nor control so long as due regard has been had to the law governing its establishment. Prior fo the .adoption of the present Constitution of this State, such may ■ have been the rule'with regard to liability of municipalities. However, section 242 of that instrument provides: “Municipal and other corporations, and individuals invested with the privilege of taking private property for public use, shall make just compensation for.property taken, injured or destroyed by them; which compensation shall be paid before such taking, or paid or secured at the election of such corporation or individual before such injury or destruction.” Concerning this section, this court has; in, substance, held, and in considering similar sections of State Constitutions the United States supreme court has held,- that a recovery may be had in cases where private property has sustained a substantial damage by making and using an improvement that is public in its character by the municipality, although the damage shall not be caused by a trespass or an actual physical invasion of the owner’s real ■ estate. City of Ludlow v. Detweiler, 20 Ky. L. R., 894 (47 S. W., 881); City of Mt. Sterling v. Jephson (21 Ky. L. R., 1023); (53 S. W., 1046); City of Henderson v. McClain, 102 Ky., 402, 19 Ky. L. R., 1451 (43 S. W., 700; City of Chicago v. Taylor, 125 U.S., 162 (8 Sup.Ct., 820; 31 L. Ed., 638). This principle, or one .quite analogous is also frequently applied in the case of slaughter houses and similar institutions, erected by private individuals or private corporations in such close proximity to another’s premises that noxious odors, gases, noises, and other elements tending to so disturb and en*367danger the lives or health or to discommode the comfort of the occupant of the adjacent premises as to materially depreciate their value and use, and such have been held to- be actionable. These actions are generally maintainable upon the theory that the maintenance of the particular insti- ■ tution or business is a nuisance. 'So it has been held that a pest house erected by a town, municipal or county authorities near the premises of another, injuring the health of his family, or exposing them fo a contagious-disease, is a nuisance, for which an action will lie. Wood, Nuis., sec. 68. See, also, Clayton v. City of Henderson, 20 Ky. L. R., 86 (44 S. W., 667). We therefore com ie that, where a city or other municipality'erects and maintains a public institution, which, by reason of its nature, endangers the lives or health of the occupants of adjacent premises, as by subjecting them to contagious or infectious, diseases, it is not only a nuisance, but it is such an invasion of the property rights of such adjacent holder as'amounts both to an injuring and a taking of property, under the section, supra, of our State Constitution. For this the city must make compensation.
There was much evidence introduced on the trial as to the extent of the danger to .persons on appellee’s premises,, it being the effort of the city to show that the danger was more imaginary' than real, and at best was so remote and improbable as to be practically nil. Many medical witnesses of apparent good standing testified that, while the disease was one both contagious and'infectious, under the systems of treatment now in use there was practically no danger of the disease being contracted as much as 30 feet away from the subject when not confined in a close room with it. Indeed, some of them testified that in the open air there was no danger of contracting the disease , a. *368distance of from four to six or eight feet, and practically all of them united in saying that the danger was theoretical or imaginary altogether from a distance of 150 feet. They claim that such is the experience of their profession, and such the opinion of their accepted authorities and writers. On the other side the testimony of many citizejns was introduced to the effect that the very fact of the existence of the pest house in such close proximity to appellee’s premises had caused alarm and' anxiety to all having occasion to visit there or use them, made it difficult to keep servants , and workmen employed upon his place, estranged his friends and visitors from his place and made the property so undesirable in the public estimation as to materially ' decrease its vendable or market value. And right here we may say is the storm center of appellant’s objections and contentions upon this appeal. It is its insistence that the establishing and maintenance of a pest house in such proximity to other persons’ property is not per se a nuisance; that damages should not be allowed for any injury unless it 'be shown to be actual and real; and that injury, it is argued, should be, not the public’s estimate of the situation, ¡but the real danger to which appellee and those occupying his premises were subjected because-of the location and treatment of the diseased patients at the pest house. We have stated above that the location of this pest house at the point and under the circumstances indicated was such an invasion of the property rights of the adjoining owner as to entitle him to recover for damages sustained. Now what is the damage that he has sustained? Is it alone that he and the members of the family are subjected to an actual danger of contracting a loathsome and dangerous disease? Or is it the annoyance and loss that he may sustain by reason of being deprived *369of a portion of his premises or the use thereof, because by reason of Its close proximity to the pest house his servants will not, and can not in safetyy cultivate it to the line? Or, is it the diminution of the salable value of his property in so far as that value has been affected? So far as the .facts in this case are concerned, it may be stated that there is no claim that the disease has actually been contracted by any member of appellee’s family, and therefore we do not feel called upon to determine to what extent such a fact, had it existed, would have been actionable against the city. If it be a fact, or be shown that the establishment of the pest house is permanent, it is the market value — that is, the selling and renting value of the owner’s premises — that must be the measure of his damages. They are as much his property as is the right to peaceably possess and personally enjoy it. It is generally this market value that is the criterion in measuring damages when property has been injured that is adopted by the courts for lack of a more uniform, certain, and satisfactory one. Therefore, to the .extent that this market value has been impaired by the establishment of appeb lant’s pest house at the point in controversy, 'appellee ought to be reimbursed by the city. It is well known and universally recognized that smallpox is a very contagious, as well as a most loathsome and dangerous, disease; that its presence, though beyond the point where an expert would determine was that of actual danger, is a fact that naturally and almost universally excites alarm, uneasiness, and repulsion. All avoid its neighborhood. Therefore lands located in very close proximity to a place where this disease is rightfully, and at all and any times liable to be, treated, *370and. from which proximity the disease is liable to infect the adjoining premises) creates in the mind of the public an . aversion to that immediate locality. It necessarily results in the impairment of the value of the property within the affected district. It was proper, therefore, to submit the question to the jury to what extent appellee’s property had been diminished in its market value by reason of the location and maintenance of this pest house, in connection with the question of probability of those upon appellee’s premises becoming infected with the disease because of such enforced proximity to it.
In the course of the introduction of the evidence (and there was much of it of the character described without going into it in detail) many witnesses were allowed to testify for appellee without showing themselves to be qualified by a sufficient acquaintance with the property, or with the market value of that or similar property, to be able to testify thereof. They, however, were permitted to state to the jury that, in their opinion, the vaSue of the property was diminished one-half. Some used the expression, “It would be worth nothing to me.” All of this class of evidence should have been excluded, and appellee should have been confined to the testimony of such witnesses who showed that they were acquainted with the property, its value, or the value of similar properties in the same vicinity and their market values, and with the fact to what extent these market values had been affected by the location of the pest-house. The proper question would be: What was or would be a reasonable market value of the premises in question but for the location of the pest house, and what was its actual market value with the pest house located and maintained as it was? We are of the opinion that to the extent that the evidence *371of the class above criticised was admitted (and it was of a material quantity, in our opinion) it was error -in the court. On the trial, appellant offered to prove by various witnesses what adjoining properties of the same class and character had been sold for just before and since the location of the pest house, it being thus attempted to prove that the market value of this property had not been impaired to the extent indicated by the opinions of appellee^ witnesses. Of course, market value is the price at which an article sells in the market. This price is fixed by sales actually consummated. Such sales, when made under normal and fair conditions, are necessarily a better test of the market valué than speculative opinions of witnesses; for, truly, here is where “money talks.” Thus, in Suth. Dám., 799, it is said: “Evidence' of actual sales of other similar property to that in question may be shown. It is competent to prove the value of other like property by which the property in question may be compared. It was held in an Illinois case, in an action to recover damages for the breach of a contract to convey land, that the plaintiff, in order to show the value of the premises in controversy, might prove, not only the worth of other adjacent property at or near the date of such contract, but even the value of land of a different quality, lying in the immediate vicinity, leaving it to the jury to determine the difference in value.” We are of the opinion that it was error in the trial court to reject the testimony above mentioned.
The court gave the jury the following instructions: “Instruction No. 1. The court instructs the jury that the law of this State made it the duty of the city of Paducah to locate and build a suitable smallpox pest house in Mc-Cracken county, not nearer the city limits, however, than *372one mile. And the court further says to the jury said-city had the legal right to locate, build and carry on the smallpox pest house fo,r the care of smallpox patients at the place described and complained of in plaintiff’s petition. Yet, while this is true, if the jury shall further believe from the evidence that by reason of the proximity of said pest house to the tract of 325 acres of plaintiff’s land, where he lives, the same has been injured in value, the law entitles him to recover in this action damages commensurate with such injury, sufficient to compensate him therefor, according to further .instructions, herein. Instruction No. 2. The court further instructs the jury that if you shall 'believe, from the evidence in this- case, that by reason .of the-nearness of said pest house to the said land of the plaintiff, or any portion there'of, there is real probable danger of the smallpox being communicated through the atmosphere from said pest house to and upon a portion or all of plaintiff’s- land, so as to really cause any persons thereon to take the smallpox, or really placing them in danger of taking it, and that by reason of such jeopardy the value of plaintiff’s land is thereby lessened to the -extent of a part or the whole of the tract, you will find for the plaintiff such sum in damages as you may believe from the evidence such portion or all of the tract has been so damaged or lessened in value by such proximity of said pest house, not exceeding the sum claimed in plaintiff’s petition. Instruction No. 3. But the court further instructs the jury that unless you shall believe-, from the evidence in this. case, that there is a real probable danger of the smallpox being carried through the air from said pest house to and upon said land of the plaintiff, and persons thereon becoming infected therewith and taking the smallpox, then, and in such case, there is *373no legal cause of action against the defendant in this case; and you will find for the defendant, although you may believe from the evidence many persons other than the-plaintiff are alarmed and express their fears of the smallpox anyhow. The meaning of this instruction is that you should not find for the plaintiff unless you shall believe from the evidence there is real probable danger that the air or the wind from the pest house will blow the smallpox onto and give it to people on Allen’s said land. Instruction No. 4. The court further instructs the jury that,, although’ you may believe from the evidence that there is a real probable danger of the smallpox being blown from the pest house onto and infecting persons on plaintiff’s land nearest the pest house, yet if you shall fail to believe from the evidence there is any real danger of its being blown upon the still more remote portion of the tract, you will not consider such remote portion of the tract in making up a verdict for compensatory damages.”
The appellant criticises the statement in the instructions “that there must have been a real probable danger of the smallpox being communicated through the atmosphere from said pest house and upon a portion of the plaintiff’s land,” etc. The court evidently intended by the term “real probable danger” to say that the probable danger must be an actual fact, as distinct from one solely imaginary or apprehended. Upon the whole, we think the instructions, except ais to measure of damages, are more favorable to appellant than it was entitled to.
It will be observed that the court failed to give to the jury a criterion or measure of damages in his instructions. An instruction on this point was offered by appellee as-follows: “Instruction No. B. The court instructs the jury that, if they should find for the -plaintiff, then that *374the criterion or measure of damage is whatever amount plaintiff’s farm has been depreciated in market or salable value' by reason of the defendant’s' locating of and the maintaining of its pest house and carrying on the same in proximity to his farm.” This instruction was objected to by appellant, and was refused by the court. We think it fairly embodies the law in this cas'e applicable to this subject, and should have been given.
For the reasons indicated, the judgment is reversed, and cause remanded, with directions to award appellant a new trial under proceedings not inconsistent herewith.
Whole court sitting.