Obusier de 15 cm Valée allowing the whole artillery train to move as fast as the infantry or cavalry. Valée also improved the guns themselves slightly, by making them lighter, and with a longer range. The complete Valée system consisted in siege guns of 24 and 16 inches, and field guns of 12 and 8 inches. It also included field howitzers of 24 and 6 inches, and a siege howitzer of 8 inches. Mountain artillery pieces were of 12 inches caliber. Mortars were of 12, 10 and 8 inches, with a 15 inches stone mortar. French artillery would be reorganized along the Valee system in
Average percentage return or CAGR, "R", can be obtained by solving the equation: . The value of "R" that makes this equation true is 0.2, or 20%. This means that the total return over the 2-year period is the same as if there had been 20% growth each year. Note that the order of the years makes no difference – the average percentage returns of +60% and −10% is the same result as that for −10% and +60%. This method can be generalized to examples in which the periods are not equal. For example, consider a period of a half of