## Gunnery: An Elementary Treatise, Including a Graphical Exposition of Field Artillery Fire |

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Gunnery: An Elementary Treatise; Including a Graphical Exposition of Field ... Jennings Cropper Wise No preview available - 2017 |

Gunnery: An Elementary Treatise; Including a Graphical Exposition of Field ... Jennings Cropper Wise No preview available - 2018 |

### Common terms and phrases

acid adjustment aiming point altitude angle of obliquity angle of site azimuth B. C. telescope ballistics base battery commander bracket burst on graze bursts in air called combustion correct corrector crest curve decimal defilade deflection denominator determined detonation diameter direction distance dynamite elevation employed enemy equal error explosive extends the arm feet per second field artillery field guns Figure fraction front frustum fuse G₁ glycerin grains ground guncotton gunner gunpowder heat height of burst horizontal howitzer ignition increase indirect fire infantry line of fire line of guns mask measured method military minuend muzzle nitroglycerin normal object observing station obtained parallax position powder practice pressure prism projectile quantity range rear reduced result right gun right piece RULE.-Multiply saltpeter salvo sheaf shell short shot shrapnel sight slant height smoke smokeless powders square substances subtract sulphuric surface target tion trajectory triangle velocity visible volleys whole number yards

### Popular passages

Page 42 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.

Page 39 - A circle is a plane figure bounded by a curved line, every point of which is equally distant from a point within called the center.

Page 7 - An improper fraction is one whose numerator is equal to or greater than its denominator as...

Page 14 - Place the numbers to be added so that the decimal points will be directly under each other. Add as in whole numbers, and place the decimal point in the sum directly under the decimal points above.

Page 7 - To reduce a mixed number to an improper fraction, — RULE : Multiply the whole number by the denominator of the fraction, to the product add the numerator, and write the result over the denominator.

Page 32 - ... and to the remainder bring down the next period for a dividend. 3. Place the double of the root already found, on the left hand of the dividend for a divisor. 4. Seek how often the divisor is contained...

Page 32 - Multiply the divisor, thus augmented, by the last figure of the root, and subtract the product from the dividend, and to the remainder bring down the next period for a new dividend.

Page 211 - ... estimates are usually too small and cause delay through an effort to correct the fire by making timid and insufficient changes in the range. Attention should rather be concentrated on deciding, from careful observation of each shot, upon the sense of a number of shots fired with the same range and site, and on quickly inclosing the target with fire which is surely short and fire which is surely over. By narrowing the bracket thus determined effective adjustment may be secured.

Page 212 - If the target is indistinct and of about the same color as the smoke, it may be less visible against the smoke as a background. A burst beyond the target may, for this reason, sometimes seem to obscure the target, and hence be judged short, when it is in reality over. On the other hand, some targets become very much more visible if projected against a smoke background.

Page 32 - TRUE DIVISOR. Multiply the true divisor by the last root figure, subtract the product from the dividend, and to the remainder annex the next period for a dividend.