ANNIVERSARY ADDRESS. 37 
Double Line. Single Line. 
October, 1890 ... 72 miles ee eo Ommailes 
October, 1/89 bea 12t .,, ee Lol mee 
October,1892.:. 149 - ,, Sr opts OD) Aa & bs 
Warchs 1893.1... 152. ,; Shahi oe 
Locomotive EHngines.—During the last year a number of engines 
have been introduced of exceptional power for passenger and 
freight service ; the object aimed at being the economical working 
of the traffic over the heavy grades and sharp curves, which are 
characteristic of our railway system. Formerly two engines were 
employed for passenger trains, whereas now, one engine not only 
does the work better, but effects a very large saving in working 
expenses. Twelve of these engines were made by the Baldwin 
Engine Company, America, and fifty by Messrs. Beyer & Peacock 
of Manchester, England. As the power developed by these 
engines in hauling trains up steep grades is probably greater than 
has been accomplished by engines working under similar conditions 
in other parts of the world, a few facts and figures concerning 
them may be interesting to the members of this Society. One of 
the engines made by the American firm was carefully tested on 
the steep grades of one in forty and one in thirty between Picton 
and Mittagong on the Southern Line, and the maximum perform- 
ance during the trial consisted in hauling a train weighing one 
hundred and fifty-six tons (in addition to the weight of the engine 
and tender), up a long grade of one in forty at a speed of nineteen 
and a half miles an hour. The indicated horse power obtained 
from diagrams taken throughout the trial averaged eight hnndred 
and eighty, while the maximum-horse power developed was nine 
hundred and twenty-five. A trial of one of the English engines 
was made on the Sutherland Bank, Illawarra Line, where a train 
weighing two hundred and twenty-five tons (in addition to the 
weight of the engine and tender), was hauled up a grade of one in 
forty-two, at a speed of twenty miles an hour. The indicated 
horse power developed averaged one thousand and nineteen, 
while the maximum indicated horse power was one thousand and 
