— Proper Length of, for Seconds, ½ Seconds, and Quarters 215 — Rules for Finding the proper Length to make any number of Vibrations in a Minute, and the Contrary 215 _PETARDS_—Dimensions of, and Stores for 216 _PLATFORMS_—Dimensions of, and Materials for Gun and Mortar 216 _POINT BLANK_—What 217 _PONTOONS_—Dimensions and Weight of, and Equipage for one 217 _PORTFIRES_—Composition for—Time they will Burn —Manner of making them at Gibraltar 218 _PROVISIONS_—Regulations respecting Rations of, for Sea and Land Service 219 _PROOF_ of Iron Guns, with the Limits of their Reception 219 — Of Brass do. 220 — Howitzers, Mortars, and Carronades 221 — By Water 222 — By assaying the Metal 223 — Marks of condemned Ordnance 224 _RATIONS_—Of Provisions for Land and Sea Service 225 — Regulations respecting their Issue 226 — Deductions to be made from the Pay of Soldiers for 227 _RANK_—Between Sea and Land Officers 228 _RECOIL_—Of Brass Guns on Field Carriages, of Iron Guns on Standing Carriages, and Mortars on their Beds 229 _RECONNOITERING_—Preparations for 230 Objects to be attended to in Reconnoitering— 1 Roads—2 Fords—3 Inundations—4 Springs and Wells—5 Lakes and Marshes—6 Woods and Forests—7 Heaths—8 Canals—9 Rivers— 10 Passes—11 Ravins—12 Cultivated Lands— 13 Orchards—14 Bridges—15 Mountains and Hills—16 Coasts—17 Redoubts—18 Castles and Citadels—19 Villages—20 Cities not fortified— 21 Fortified Towns—22 Positions _RICOCHET_—Rules for firing 243 _ROCKETS_—Composition for Sky Rockets 245 —Table of General Dimensions of, with their Sticks 245 —Height to which they will ascend 246 _ROPE_—How distinguished—Rule for finding the Weight of 247 _SAND BAGS_—Dimensions of—Number required 248 _SAP_—Manner of carrying it on 248 _SECANTS_—Table of Natural Secants 248 _SHELLS_—Dimensions and Weight of, for Mortars and Howitzers 249 — For Guns and Carronades 250