CHAP. XII.--MANUFACTURE AND MANAGEMENT OF STEAM ENGINES.

Construction of Engines.

Erection of Engines.

Management of Marine Boilers.

Management of Marine Engines.

Management of Locomotives.




MECHANICAL PRINCIPLES OF THE STEAM ENGINE.



CLASSIFICATION OF ENGINES.


1. _Q._--What is meant by a vacuum?

_A._--A vacuum means an empty space; a space in which there is neither
water nor air, nor anything else that we know of.

2. _Q._--Wherein does a high pressure differ from a low pressure engine?