Electricity is not in any sense a necessity, and under no conditions is it universally used by the people of a community. It is but a luxury enjoyed by a small proportion of the members of any municipality, and yet if the plant be owned and operated by the city, the burden of such ownership and operation must be borne by all the people through taxation. Now, electric light is not a necessity for every member of the the community. It is not the business of any one to see that I use electricity, or gas, or oil in my house, or even that I use any form of artificial light at all.