Spring Engine

Spring Engine

	Page
The Skein of Cord in Various Stages	293
The Metal Slip Hook that Pulls Down the Arm and also Releases It	294
The Metal Catch for a Small Catapult	295
Catapult Completed	298
A Catapult for Field Service	299
Roman Ballista, with Its Bow String Over the Catch of the Lock and an Arrow on the Stock	300
A Ballista for Throwing Stone Balls	302
Fore End of a Ballista without Its Stock ; Front View	304
Fore End of a Ballista and Its Stock ; Side View	305
Surface and Side Views of the Stock of a Ballista	306
The Claws of the Windlass of the Ballista Hooked Over the Bow String	307
The Trebuchet	308
The Action of the Trebuchet	310
A Trebuchet with Its Arm being Wound Down	311
The Arm of a Trebuchet and Its Counterpoise : Front and Side View	312
Trebuchets Throwing Barrels Filled with Earth into a Ditch Outside a Fortress , so as to Enable the Besiegers to Pass Over it and Apply Their Scaling Ladders to the Walls	313
A Spring Engine	316
A Spring Engine	317
A Spring Engine	318
Crossbowman	319

Note by Author

The Crossbows and their details I have drawn chiefly from examples in my own collection, and the working plans of siege engine from large and small models I have constructed.

The Pictorial Illustrations form Medieval books and Manuscripts have been most admirably copied from the originals - for subsequent reproduction herein - by Mr. W. Woodrow of the British Museum Library.

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