22
A. Ghosh
10
100
1000
1700
1750
1800
Yearly Pig Iron
Production in
England -1000
Tons)
Newcomen’s
Atmospheric
Engine (1712)
James Watt’s
Separate Condenser
(1769)
Rotary
Engine
(1788)
Trevithik’s
Real Steam
Engine (1802)
Railway
Fig. 24 The sudden change in the growth rate of iron production
First Industrial
Revolution
Second Industrial
Revolution
Year
Fig. 25 The Industrial Revolutions indicated by the changes in slope of the GDP growth rate