144 PRESIDENT’S ADDRESS—SECTION H. 
driven by eccentrics off the main shaft, to automatically shut 
off steam in case the engine should exceed its normal speed by 
five revolutions. 
Each engine is provided with a by-pass from low pressure 
exhaust, to enable the engines to exhaust into oimosnee in 
case of a breakdown of the condensers. 
An elaborate system of oiling arrangements has been prevaaed 
the whole of the oil draining into a common reservoir, and from 
thence to a filter, after which it is elevated to an oil tank by 
air pressure, and from thence it will gravitate to the oil cups 
on engines. 
The switchboard consists of four generator panels, one sum- 
mation panel, two accumulator panels, one lighting panel, and 
ten feeder panels. Each panel is provided with circuit breaker, 
switches, ammeters, and watt-meters, the watt-meters on 
generator and summation panels being of the static type. The 
equalising switches for paralleling the generators are mounted 
on pedestals close to the generators. 
Independent switchboards are provided for controlling the 
lighting circuits in offices, engine room, and car barn. Two 
batteries of accumulators, each of 300 cells, are provided for the 
lighting circuits; one battery has a capacity of 380 square 
hours, and the other a capacity of 140 ampere hours. 
In designing and carrying out the above work, I had the 
benefit of the advice and assistance of Mr. P. B. Elwell, M. Inst. 
C.E., now unfortunately deceased, and I have much pleasure in 
testifying to the able co-operation of my principal assistant for 
tramways, Mr. G. Fischer, M. Inst. C.E., under whose super- 
vision the whole of the designs were prepared, and the work 
carried out. 
Cars were provided by the Railway Commissioners direct, 
and without my intervention, they being advised as to selec- 
tion of design and details by the late Mr. P. B. Elwell, 
M. Inst. C.E. 
The following is a brief account of their design and con- 
struction :— 
There are four types of cars used, three of which are either 
provided with motors and controllers, or they are used as trail 
cars only. 
Four-wheeled Closed Type.—Leneth over headstocks, 25 ft. ; 
length over saloon body, 18 ft.; width, 6 ft. 8} in.; weight, 
including two motors’ equipments, 7 tons 19 ecwt. 2 qrs.; 
seating capacity, 26 passengers; or with motor and trailer, 
52 passengers. The seats are longitudinally placed, and there 
are sliding doors at each end. 
Four-wheeled Combination Type.—Length over headstocks, 
28 ft.; length over bulkhead pillars, 23 ft.; length of saloon 
body, 10 ft. 2 in.; width, 6 ft. 84 in.; weight, including two 
