It shall be the duty of the Chairman of the Board of Health, or such other officers as may be directed by him, to serve a notice, in writing upon the owner, occupant or agent of any lot, building or premises in or upon which any nuisance may be found, or who may be the owner of cause of any such nuisance requiring immediate abatement of such nuisance in such manner as the officer serving such notice shall, under the direction of the Chairman of the Board of Health prescribe. It shall not be necessary in any case for any officer to specify in his notice the manner which any nuisance shall be abated unless it be deemed advisable so to do. And in case such owner, occupant or agent fails, neglects or refuses to comply with such notice, the Chairman of the Board of Health shall take legal action to cause such nuisance to be abated; and Provided further, that whenever the owner, occupant or agent of premises in or upon which any nuisance may be found is unknown or cannot be found, the Chairman of the Board of Health, or person designated by him, shall proceed to abate the same without notice; and in either case the Chairman of the Board shall report to the City Council the cost of abating such nuisance, and such expense shall be the cost of abating such nuisance and shall be collected from the persons who may have created, continued or suffered such nuisance to exist or from the owner of the premises upon which such nuisance is found. And for the purpose of carrying out the requirements of this Section, the Chairman of the Board of Health, or person designated by him, shall be permitted to obtain a warrant from a court of competent jurisdiction to enter, in the daytime, any house, store, stable or other building and to make any examination he may deem necessary, upon showing probable cause that a nuisance exists. (Ref. 16-231, 16-238 RS Neb.)