[Pramāṇa](https://indike.org/pramana/) › [Studies](https://indike.org/pramana/ins) › [Science, technology and education](https://indike.org/pramana/ins.science) › [A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D.](https://indike.org/pramana/ins.science.ray-1902) › v1.c19.5 # A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c19.5 A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v1.c19.5 - **Language:** English ### [v1.c19.5](https://indike.org/pramana/ins.science.ray-1902.v1.c19.5) "The efflorescences thus produced consist of three groups; 1st, the neutral, which contain no carbonate of soda (these consist chiefly of sodium chloride and sulphate, and frequently magnesium sulphate); 2nd, the alkaline chlorides and sulphates, but no lime or magnesian salt; 3rd, the nitrous efflorescences."—Dr. Center's Note on \*Reh\* quoted in Watt's Dictionary of the "Economic Products of India". Vol. VI. Part I. pp. 410-417. - [Previous: v1.c19.4](https://indike.org/pramana/ins.science.ray-1902.v1.c19.4) - [Next: v1.c19.6](https://indike.org/pramana/ins.science.ray-1902.v1.c19.6) - [Up: v1.c19](https://indike.org/pramana/ins.science.ray-1902.v1.c19) --- Source: [https://indike.org/pramana/ins.science.ray-1902.v1.c19.5](https://indike.org/pramana/ins.science.ray-1902.v1.c19.5) · Pramāṇa