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

B. F. Johnson Publishing Company, 1912 - Artillery, Field and mountain - 291 pages

### Contents

 MENSURATION PAGE 3 43 12 45 23 47 ALGEBRAIC EXPRESSIONS AND SIMPLE EQUATIONS 50 PART IIGUNPOWDER AND HIGH EXPLOSIVES 59 COMBUSTION EXPLOSION DETONATION 61
 99 207 109 283 149 284 245 288 Copyright

### 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.