human
Most if not all the compositions used in fireworks, including military fireworks, were more the result of the labours of the artisan who was neither controlled by fixed principles nor by a knowledge of the effects and properties of bodies and of the systematic experiments of the chemist, and yet in consequence of some fortuitous and repeated trials we find that he has been successful, and moreover has amassed a body of facts which we may reasonably infer may either be rendered more perfect by knowledge or improved upon by the exact aid of chemical science.