1. In addition to the conventional rocket propulsive applications, a growing number of diverse applications has been noted. These began as early as 1871 (1.001) and now include power for autogyros and helicopters (1.008, 1.063), antispin rockets (1.013), valve operation (1.017), starters (1.018, 1.019, 1.053, 1.065, 1.086, 1.158), recoilless guns (1.010, 1.083), industrial applications (1.087, 1.088, 1.089, 1.133, 1.152, 1.155, 1.164), and a host of auxiliary devices (1.084, 1.110, 1.153, 1.165, 1.169).
2. Spurred on by applications of new, high energy propellants, the field of internal ballistics received early attention by such investigators as Bunsen in 1857 (3.060), Abel in 1869 (3.001), Berthelot in 1871 (3.035, 3.036), and Charbonnier in 1908 (3.069). Increasing attention to the combustion of propellants in guns lead to a study of burning in bombs. This work, uniting guns and rockets, was carried out by workers such as Muraour and co-workers (3.237-3.301) and by later workers such as Bourgoin (3.047), Bonner (3.045), and Crawford (3.090, 3.091). The relationship between bomb burning rates and rocket motors has also been investigated (3.317).