Pradical Gunnery . 137

S, 4 s : L, 7° 13 # .:: 40 : 7 the Vi-brations required.

CASE LXXIV.

A Piece whose Randon at 5 i°. zohsAM— 43 56, (Fig. 19.) the Time ofthe Flight of her Shot being 24 Vibra-tions, Quere the Time of its Flight toX, whole horizontal Distance is AY ----Z446.

Am : 4! Y :: 24: 19 the Time re-quired.

CASE LXXV.

A Piece whose horizontal Randonat 52°. 30'is Am [Fig. 16.) — 4Zs6,the lime of the Flight of her Shot be-ing 2 4 Vibrations, being planted at A yabove the Plane of the Horizon, withthe fame Direction placeth her Shot atE, whose horizontal Distance from

T the