The Project Gutenberg eBook of A System of Pyrotechny, by James Cutbush.

Fig. 1.—A. is the entering rammer or driver. It is bored in such a manner, that the whole of the broach, or piercer above the nipple, n, may be admitted. The cavity of the bore is cylindrical, and equal in diameter to that of the foot of the broach. This driver serves to fix the rocket case, over the broach, in the mould G, and to form the cup, o, fig. 10, for receiving the priming.

B. is the driver of the first charge. It is bored in such a manner, as to admit the broach to within two-fifths of the interior diameter of the case, from its base. Its bore is cylindrical, and has the diameter of the broach, at the height of two-fifths the interior diameter of the case.

C. is the driver of the second charge, and admits the broach two-thirds of its length; the diameter of its bore being the same as that of the broach, at one-third of its height.

D. is the driver of the third charge, and admits one-third of the broach; the diameter of the bore being that of the broach, at two-thirds of its height.

E. is the last driver, and is solid; the charge being above the summit of the broach. See page 231.

Fig. 1. (cont.) and Fig. 6.—The broach or piercer I, fig. 1, (a section of which is represented in fig. 6), is a truncated cone, having a hemispherical summit. The cone is the part from a to b, fig. 6. The diameter of the base of the cone at b, ought to be two-fifths of the interior diameter of the case, and the diameter at the summit, one-fifth, which is also the diameter of the small hemisphere at the top. The height from b to a, ought to be seven times the interior diameter of the case, or 17.5 times the diameter of the base b. The part n, fig. 1, and from b to c, fig. 6, is rounded. Its diameter ought to be that of the interior of the case, and its height, seven-tenths of that diameter. This is called the nipple, and is the part, which gives shape to the cup o, fig. 10. The part m, fig. 1, and from c to d, fig. 6, is cylindrical, and may be made of any height or diameter, provided the latter is not less than that of the cone. It is generally one-twentieth more than the exterior diameter. This part ought to penetrate into the bottom of the charging mould, G, fig. 1, and fit closely, so as to be firm. The part from d to e, fig. 6, is the blade or tongue of the broach. It is rectangular, and enters into the block H, fig. 1, where it is firmly fixed. The size of this part is arbitrary, as well as that of the block H, fig. 1.

Fig. 11.—The Rocket with its stick. For want of room, the stick is represented in two pieces.

TRANSCRIBER'S NOTE

For consistency and clarity, a space (when absent) has been placed between the number and the unit of weight lb. and lbs. giving for example '21 lbs.' in place of '21lbs.'

Fractions, usually in the form '14 3-4' in the original text, have been converted to the form '14³/₄' in this etext.

Also, in a few larger tables with italic styling on some text, this italic styling has been removed, for consistency with the .txt version. In a few cases a word has been abbreviated to conserve table space: cal. = caliber; diam. = diameter.

Some instances of Tome in French citations have been changed to Tome (no italic), for consistency.

Some accents and spelling in French citations have been corrected.

For consistency, instances of 'fireworks' and 'fire works' have been changed to the predominant form 'fire-works'.

Obvious typographical errors and punctuation errors have been corrected after careful comparison with other occurrences within the text and consultation of external sources.

Except for those changes noted above and below, misspelling in the text, and inconsistent or archaic usage, have been retained. For example: meal-powder, meal powder; quick-match, quick match, quickmatch; siege, seige; musket, musquet; hazle; dodecaedron; deposite; inclose.

Pg xiv. 'Meutrieres' replaced by 'Meurtrières'.
Pg xiv. 'Siemienowick' replaced by 'Siemienowicz'.
Pg xviii. 'accesssion' replaced by 'accession'.
Pg xxv. 'alchohol' replaced by 'alcohol'.
Pg xxxi. The references to 40° have been retained (should be 4°).
Pg xxxv. 'indispensible' replaced by 'indispensable'.
Pg xl. 'knowlege' replaced by 'knowledge'.
Pg xliv. 'Siemienowick' replaced by 'Siemienowicz'.
Pg 19. 'pluverized' replaced by 'pulverized'.
Pg 19. 'foretel' replaced by 'foretell'.
Pg 22. 'Belhelaive' replaced by 'Belhelvie'.
Pg 24. 'Heroditus' replaced by 'Herodotus'.
Pg 26 Footnote [8]. 'Pontoppidon' replaced by 'Pontoppidan'.
Pg 26 Footnote [8]. 'seive' replaced by 'sieve'.
Pg 31. 'Heroditus' replaced by 'Herodotus'.
Pg 34. 'Tunesteick' replaced by 'Tunestrick'.
Pg 44. 'skreen' replaced by 'screen'.
Pg 53. 'Bradenburgh' replaced by 'Brandenburgh'.
Pg 67. 'Rifault' replaced by 'Riffault'.
Pg 68. 'indispensible' replaced by 'indispensable'.
Pg 74. 'exhilirating' replaced by 'exhilarating'.
Pg 100. 'salpetre' replaced by 'saltpetre'. (twice)
Pg 100. 'decribed' replaced by 'described'.
Pg 107. 'occured' replaced by 'occurred'.
Pg 107 Footnote [17]. 'occurence' replaced by 'occurrence'.
Pg 134. 'combustbile' replaced by 'combustible'.
Pg 138. 'one-hundreth' replaced by 'one-hundredth'.
Pg 140. 'eprovette' replaced by 'eprouvette'.
Pg 140. 'pulverized quick-lime' replaced by 'pulverized quicklime'.
Pg 142. 'processess' replaced by 'processes'.
Pg 148. 'frankincese' replaced by 'frankincense'.
Pg 158. 'by some. It is' replaced by 'by some it is'.
Pg 159. 'guages' replaced by 'gauges'.
Pg 163. 'tranverse' replaced by 'transverse'.
Pg 172. 'which see.' replaced by 'which see below.'.
Pg 188. 'XXXVI' replaced by 'Sect. XXXVI'.
Pg 192. 'westtern' replaced by 'western'.
Pg 193. 'nesessary' replaced by 'necessary'.
Pg 197. 'absord' replaced by 'absorb'.
Pg 203. 'harpsicord' replaced by 'harpsichord'.
Pg 206. 'metalic' replaced by 'metallic'.
Pg 221. 'Siemenowitz' replaced by 'Siemienowicz'.
Pg 232. 'Britanica' replaced by 'Britannica'.
Pg 234. 'paste-board' replaced by 'pasteboard'.
Pg 235. 'whe r ' replaced by 'where'.
Pg 236. 'Peirre' replaced by 'Pierre'.
Pg 237. 'bass' replaced by 'brass'.
Pg 241. 'repecting' replaced by 'respecting'.
Pg 244. 'Britanica' replaced by 'Britannica'.
Pg 245. 'cases is' replaced by 'case is'.
Pg 251. 'abbe Raynal' replaced by 'Abbé Raynal'.
Pg 256. 'Eygpt' replaced by 'Egypt'.
Pg 257. 'groupes' replaced by 'groups'.
Pg 258. 'Tuilleries' replaced by 'Tuileries'.
Pg 259. 'Tuilleries' replaced by 'Tuileries'.
Pg 262. 'Brittish' replaced by 'British'.
Pg 271. 'pastebord' replaced by 'pasteboard'.
Pg 274. 'parts length' replaced by 'parts in length'.
Pg 276. 'breakes' replaced by 'breaks'.
Pg 277. 'Volcono' replaced by 'Volcano'.
Pg 278. 'sucession' replaced by 'succession'.
Pg 284. 'esssential' replaced by 'essential'.
Pg 287. 'ingedients' replaced by 'ingredients'.
Pg 287. 'will to exhale' replaced by 'will exhale'.
Pg 314. 'artficial' replaced by 'artificial'.
Pg 324. 'phosporus' replaced by 'phosphorus'.
Pg 325. 'pealed' replaced by 'peeled'.
Pg 328. In the table '286' replaced by '280' and '338' by '330'.
Pg 328. ': 160 :' replaced by ': 100 :'.
Pg 331. 'section iv' replaced by 'section iii'.
Pg 332. 'counter-ter weights' replaced by 'counter-weights'.
Pg 343. 'desscribed' replaced by 'described'.
Pg 345. 'unrol' replaced by 'unroll'.
Pg 345. 'couratines' replaced by 'courantines'.
Pg 351. 'fiit' replaced by 'fit'.
Pg 359. 'thicknes' replaced by 'thickness'.
Pg 362. 'case whirl' replaced by 'case whirls'.
Pg 382. 'pyrimids' replaced by 'pyramids'.
Pg 383. 'air' replaced by 'airs'.
Pg 384. 'Votaic' replaced by 'Voltaic'.
Pg 406. 'Sec. XIV.' replaced by 'Sec. XV.'.
Pg 413. 'Archimedian' replaced by 'Archimedean'. (twice)
Pg 414. 'star weeel' replaced by 'star wheel'.
Pg 418. 'Archimedian' replaced by 'Archimedean'.
Pg 431. 'Alchohol' replaced by 'Alcohol'.
Pg 440 Footnote [28]. 'meditate' replaced by 'mediate'.
Pg 440 Footnote [28]. 'Guillume' replaced by 'Guillaume'.
Pg 443. 'ladle-full' replaced by 'ladleful'.
Pg 453. 'sauccissons' replaced by 'saucissons'.
Pg 454. 'sauccissons' replaced by 'saucissons'.
Pg 454. 'squills' replaced by 'quills'.
Pg 455. 'mosique' replaced by 'mosaique'.
Pg 460. 'richochet' replaced by 'ricochet'.
Pg 475. 'parallelopepids' replaced by 'parallelepipeds'.
Pg 476. In the table, 'comsition' replaced by 'composition'.
Pg 488. 'Shrapnell' replaced by 'Shrapnel'. (twice)
Pg 491. 'Siemienowich' replaced by 'Siemienowicz'.
Pg 514. 'Dictionaire' replaced by 'Dictionnaire'.
Pg 517. 'passsing' replaced by 'passing'.
Pg 519. 'He how' replaced by 'He now'.
Pg 526. 'two-third' replaced by 'two-thirds'.
Pg 533. Duplicate phrase 'Elevation for extreme range' removed from the table.
Pg 535. 'their being' replaced by 'there being'.
Pg 535. 'richochet' replaced by 'ricochet'.
Pg 542. 'the' removed from header 'Base of the conical head' in the table.
Pg 560. 'Siemienowick' replaced by 'Siemienowicz'. (twice)
Pg 570 Footnote [43]. 'fennell' replaced by 'fennel'.
Pg 580. 'seive' replaced by 'sieve'.
Pg 581. 'pullies' replaced by 'pulleys'.
Pg 585. 'de Gouvernment' replaced by 'de Gouvernement'.
Index:
Pg 590. 'Bertholet' replaced by 'Berthollet'.
Pg 590. 'Cagliostra' replaced by 'Cagliostro'.
Pg 590. [Callinicus:] '673' replaced by '544, 548'.
Pg 593. 'Copal' entry moved to correct alphabetic order.
Pg 596. 'Grœcus, Marcus' replaced by 'Græcus, Marcus'.
Pg 598. Section for 'J' moved after section for 'I'.
Pg 598. [Inflammable:] 'Gingembrie' replaced by 'Gengembrie'.
Pg 598. 'Jassamine' replaced by 'Jessamine'.
Pg 599. 'Lampadacea' replaced by 'Lampadaria'.
Pg 599. 'Longschamp' replaced by 'Longchamp'.
Pg 602. [Pliny:] 'Porcena' replaced by 'Porsena'.
Pg 604. 'Rochus' replaced by 'Rochos'.
Pg 606. 'Seneka' replaced by 'Seneca'.
Pg 609. [Watson:] 'Landaff' replaced by 'Llandaff'.
Pg 609. 'Will-with-the-whisp' replaced by 'Will-with-the-Wisp'.