These holes are of course for the screws which will fix the valve-seat immovably to the cylinder, and you will not fail to remember that they should be bored ... Remember that a broken tap in a hole is far worse than a broken drill, bad as that anbsp;...
|Title||:||How to make a Steam-Engine. A treatise for the instruction and amusement of ingenious boys. Including lessons on the use of mechanical tools, etc|
|Author||:||William Edward DICKSON|