Page:Tactics (Balck 1915).djvu/139

 III. THE POWER OF FIREARMS AND EXPEDIENTS FOR MINIMIZING LOSSES.

A. THE POWER OF FIELD ARTILLERY.

1. THE FIELD GUN.

The field artillery of all the states that need be considered is armed with a rapid-fire gun provided with shields and capable under peace conditions of firing as many as twenty shots per minute. Its caliber varies from 7.5 to 8.38 cm. (Germany, 7.7; France, 7.5; Russia, 7.62, and England, 8.38 cm., the last-named being an 18 pdr.). The German gun fires shrapnel weighing 6.85 kg. (the Russian, 6.5, and the French 7.25 kg.) and high explosive shell of approximately the same weight, with an initial velocity of 465 m. (the Russian 588 and the French 530 m.). The projectiles are burst through the action of combination fuzes (in Germany graduated to 5000, in France and Russia to 5500 m.). The projectiles have a maximum range of 8000 m., when percussion fuze is used. Canister has been replaced by shrapnel, which bursts approximately 200 m. in front of the gun when the fuze is set at zero. The German field artillery is also equipped with a light field howitzer, cal. 10.5 cm., which fires shrapnel weighing 12.8 kg. (time fuze ranging from 300 to 5600 m.) and shell weighing 15.7 kg. (time fuze ranging from 500 to 5600 m.). The Germans use heavy field howitzers (cal. 14.91 cm., firing shell that has an extreme range of 6870 m.) in the heavy artillery of the field army. France uses the 15.5 cm. Rimailho howitzer, England a 12.7 cm. howitzer and another long piece of 12 cm. caliber.

Percussion shrapnel is used for defense at short range, and in fire for adjustment; its effect depends upon the range