47. What pieces go on the same carriage?

The 32-pound gun, and 8-inch howitzer. All other pieces have separate carriages.

48. How many sizes of rollers are used?

Two: one for the carriages of the 12, 18, and 24-pounders; the other for the remaining carriages.

49. Are cap-squares used with these carriages?

No.

50. What other purposes do the wheels subserve besides assisting in manœuvering the gun-carriage?

In transporting the piece on its carriage for short distances, as from one front of a fort to another.

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51. Describe the chassis.