A study on the Test and Estimation of Calorie by the Combination at the Manufacture of Briquet

연탄제조시(煉炭製造時) 무연탄(無煙炭)의 배합(配合)에 따른 발열량(發熱量)의 검정(檢定)과 추정(推定)

The briquet is made of the coal. The calorie of briquet is 4370 kcal/kg by the law. The combination of coal is important for the manufacturing of briquet. We must know that the Test and Estimation of Calorie is necessary to study. The factory does not make the briquet by the experiment now, but they have made it properly by the experience. We know that the theoritical value of calorie resembles to the practical value of calorie. I think the factory must make a briquet certainly by the experiment. It is a best method for men to prevent from the crisis of briquet gas.