. The street railway review . ve. During the trip shown the mean currentis about 100 amperes with 350 as a maximum. The other curve illustrates an entirely diflerent set of con-ditions. It was taken just after a heavy thunder stormamounting almost to a cloud burst and shows the cars wellloaded and about two minutes late. There is no waiting atthe terminals, but little drop at the railroad and the hills aremade with a rush that throws the ammeter needle entirelyoff the paper. The tests on the station were made Friday and Saturday,March 18 and 19, 1898. The test on the first day began at5:43 a.
. The street railway review . ve. During the trip shown the mean currentis about 100 amperes with 350 as a maximum. The other curve illustrates an entirely diflerent set of con-ditions. It was taken just after a heavy thunder stormamounting almost to a cloud burst and shows the cars wellloaded and about two minutes late. There is no waiting atthe terminals, but little drop at the railroad and the hills aremade with a rush that throws the ammeter needle entirelyoff the paper. The tests on the station were made Friday and Saturday,March 18 and 19, 1898. The test on the first day began at5:43 a. m. and ended at 11:32 p. m., with natural gas forfuel; on the second day the run was between 6:07 a. m. andII .oSyi p. m., the boilers being fired with coal. As the ob-ject of the tests was to determine the behavior of the stationunder its usual running conditions, no effort was made toimprove its usual performance in the least. The regular at-tendants were on duty with directions to run as thoughnothing unusual was going PLAN OF ENGINE AND DYNAMO ROO The instruments used, with the exception of the gas me-ter, were calibrated in the university laboratories and propercorrections made in the calculations. The recording watt-meter used to measure the combined output of the soovoltmachines was new and was lent by the manufacturer. Itwas compared with a Thompson composite balance andfound to have an inappreciable error within the limits ofobservation during the tests. During the entire period of the tests the following read-ings were taken every six minutes: Boiler pressure, feedwater temperature, gas meter (first day), indicator cards, re-cording wattmeter, voltage in 500-volt and 220-volt circuitsand current in 220 volt circuits. There were also two menweighing feed water and two taking records from the re-cording ammeter, making 13 observers continuously onduty. These men were nearly all members of the seniorclass in electrical engineering and were perfectly familiarwith the
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
