_Gas Engine_.

s. d.
Upkeep, interest and sinking fund at 15 per
cent. on £1,292 is, per day. 12 11
Anthracite, 1.156 pound per actual horse
power per hour = for 750 horse-hours, at
25s. 6d. 9 10
Coke, 0.215 pound × 10 × 75 = 161¼ pounds
at 28s. 2 0
Oil, 0.0084 pound per actual horse power per
hour, or 0.0084 × 10 × 75 = 6.28 pounds at
2.8d. 1 5½
Grease, 0.754 pound per day at 6.4d. 0 5
Electric kindling, on cost. 0 3½
Wages. 4 9½
---------
£1 11 8

The big gas engine making its own poor gas, and running 10 hours a day,
has thus the best of it in the comparison with the steam engine of equal
power.

* * * * *




A PROJECTING APPARATUS FOR BALANCES OF PRECISION.