C. 0.-BURGE. | LXXXIX. 
in the requisite short period of time. As to retardation, 
the maximum speed at which tests were made was at 98°2 
miles per hour, when a stop was made in 1 mile, and in 67 
seconds, or about 2 ft. per second per second. The maxi- 
mum retardation however was when 78°9 miles per hour 
was reduced to nil in half a mile, and in 45 seconds, being 
about 23 ft. per second per second. 
Figures were given as to the consumption of energy, but 
none seem to have been recorded for the maximum speed 
attained, but for 87 miles per hour, uniform speed, 7°47 
kilowatt hours per mile output at the power house was 
noted. Owing to the distance, it is said, of the origin of 
the power, 8 miles from the line, only 67% of the output 
there was available at the rotor shafts. 
Air resistance was measured by an apparatus fully 
described in the paper, the average results satisfying the 
following formula where the symbols represent Ibs. per 
square foot and feet per second 
r=0°001334 v? 
The motion of the cars was very steady and smooth in 
all the trials, up to about 80 miles per hour, but over this, 
the weakness of the road began to show, and it was stated 
that the 100 miles per hour was not exceeded on this 
account, and not to any deficiency of the motive power or 
in its application. 
Some months later in June 1902, an electric locomotive 
which had been designed for the purpose was tried, but 
very high speeds do not seem to have been aimed at or 
attained. The weight of locomotive and car together, 
particulars of which are given in the paper, was only 76 tons 
including passengers. The normal power, which was 
through two motors, was reduced to 800 HP. The main 
difierence however, was in the transmission of the current 
direct to the motors, without transformation. 
