Bowker v. Baker (1946) 73 Cal.App.2d 653 involved the transportation of parochial school pupils on public school district owned school buses pursuant to Education Code section 16257, which provided: "The governing board of any school district may allow pupils entitled to attend the school of the district but in attendance at a school other than a public school, under the provisions of Section 16624, transportation upon the same terms and in the same manner and over the same routes of travel as is permitted pupils attending the district school." In Bowker v. Baker (1946) supra ,. . . the court recognized that 'many expenditures of public money give indirect and incidental benefit to denominational schools and institutions of higher learning. Sidewalks, streets, roads, highways, sewers are furnished for the use of all citizens regardless of religious belief. . . . Police and fire departments give the same protection to denominational institutions that they give to privately owned property and their expenses are paid from public funds.