Category: History - Modern (1750+)
Origin of Coal, 9. Coal of various ages, 11. Graphite, 12. Recent Vegetable Deposits, 13. Mode of occurrence of Coal, 13. Structure of Coal, 15. Uses of Coal, 16. Coal a source of Energy, 17. Mechanical Equivalent of Heat, 19. Value of Coal as a Fuel, 20. Small efficiency of S...
of the original discoverer has led to the elucidation of the constitution of these colouring-matters. The phthaleins are members of the triphenylmethane group, and are therefore...
5. CHAPTER II.The nature of the products obtained by the destructive distillation of coal varies according to the temperature of distillation, and the age or degree of carbonization of the co...
4. CHAPTER I."Hier [1771] fand sich eine zusammenhaengende Ofenreihe, wo Steinkohlen abgeschwefelt und zum Gebrauch bei Eisenwerken tauglich gemacht werden sollten; allein zu gleicher Zeit w...
6. CHAPTER III.Among the most venerable of natural dye-stuffs is indigo, the substance from which Unverdorben first obtained aniline in 1826. The colouring matter is found in a number of legum...
1. CHAPTER I.Origin of Coal, 9. Coal of various ages, 11. Graphite, 12. Recent Vegetable Deposits, 13. Mode of occurrence of Coal, 13. Structure of Coal, 15. Uses of Coal, 16. Coal a source...
3. CHAPTER III.Natural Sources of Indigo, 124. Syntheses of the Colouring-matter, 126. Carbolic Oil, its treatment and its constituents, 129. Phenol Dyes, 132. Salicylic Acid and its uses, 134...
2. CHAPTER II.Ammoniacal Liquor of Gas-works, 64. Origin of the Ammonia, 65. Ammonia as a Fertilizer, 65. Other uses of Ammonia, 67. Annual production of Ammonia, 68. Utilization of Coal-tar,...