The development of the heating, electric power and lighting, gas, and water systems of the University has been closely allied to the physical plant expansion and to the advancements in accepted practices in the field of the various utilities. From time to time the various systems have been extended, modernized, or rebuilt as conditions warranted, and every effort has been made to have them conform to the standard practices of the day.
In general, the development of the heating plant may be divided into three periods, that of heating the individual buildings by means of stoves, that of the development of small independent heating plants to service groups of buildings, and that covering the development of a central heating plant and distribution system.
The development of the lighting system may also be divided into stages: first, the period when oil lamps were the sole means of illumination; second, the era when the University had a gaslighting system; third, the period when the change was being made from gas lighting to direct-current electrical illumination; and fourth, the time of the transfer to alternating-current electrical illumination and a system, cross connected between the University and the local utility company, to provide for a maximum of service with the least possible interruption.
The water supply system has also developed through three distinct periods: first, the period of individual wells and pumps; second, that of a University owned and operated central supply system; and third, that of the abandonment of the individual system in favor of the central water distribution system of the city of Ann Arbor.
Heating. — The first University structures erected in 1840 and those added to the physical plant up to the year 1879 were heated by the then universal means of wood-burning stoves. In 1879 two heating plants were installed, and steam became the medium for heating the buildings. One of these heating units was erected just northeast of University Hall, and the other was housed in a lean-to addition built at the east end of the Chemical Laboratory, later known as the Pharmacology Building. The first of these two units provided for the heating of the Law Building, University Hall, the Library, the Museum, the Dental Building, and the Homeopathic Hospital. These structures formed a compact group of buildings in the west and north sections of the campus. The second unit provided for the heating of the Chemical Laboratory and the Medical Building in the eastern part of the campus.
With these first heating plants came the beginning of a central heating distribution system. The various buildings were connected to the heating plants by steam mains and return lines buried