Word: tunnelling
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Dates: during 1960-1969
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Steam from the Cambridge Electric Company's boilers enters the three pipes in the Tunnel at a pressure of one hundred pounds per square inch and a temperature of 425-430 degrees Fahrenheit. (Depending on the needs of the University, one or more of these pipes may be shut down.) After going through reducing valves which lower its pressure to about five pounds per square inch, the steam travels to individual buildings where it heats tanks of water. The Houses and most other buildings outside the Yard have their own water reservoirs, including separate tanks for domestic hot water...
...station. At all times, both in the Yard and outside, the steam remains within a closed network of pipes; but in the process of giving up heat much of it condenses to distilled water. This condensate is collected and pumped (through a small pipe on the floor of the Tunnel) back to the Western Avenue power plant where it is again converted to superheated vapor...
...data board makes it possible to find out what you want to know about a building without actually going inside. In the past, if a complaint came from, say, the Biological Laboratories that rooms were overheated, Buildings and Grounds had to dispatch a North Yard Tunnel man to the Biological Laboratories in order to get readings from the relevant thermometers and pressure guages. Now, whenever he wishes, a man sitting in front of the Langdell Hall data board can find out the air temperature of the Biological Laboratories (or a great many other things about any building in the North...
...Kingsbury was about to suggest that we resume our travels through the Tunnel when a loud series of long and short buzzes rang in his office. "That's our own private communication system," he explained. "There are telephones throughout the Tunnel, each with its own code of short and long rings. And when you make a call, the signal sounds on all of the phones. If you ever hear a steady 5-second blast, that means there's an emergency." (He added in passing that emergencies are rare. In fact, no serious explosion of a steam line has ever occurred...
...would inspect the data board, then to travel underground to the river, cross the Charles inside the Weeks Bridge, and finally come up to the surface at the Business School operating station in McCulloch Hall. Mr. Kingsbury wished us well and placed us in the care of another Tunnel engineer, this time a South Yard...