Beginning with the year 1836, the beet-sugar industry in Germany, which had been paralyzed by the raising of the Continental blockade, went ahead rapidly. The German manufacturers gradually succeeded in obtaining a higher extraction of sugar from the beet and consequently their operations showed an increased profit. Krause of Austria and Schubarth of Prussia, both of whom had studied beet-sugar making in France, did much by their efforts to rehabilitate the industry in Germany, where it has steadily grown in importance ever since. The manufacture of beet sugar was revived by Austria in 1831 and by 1840 there were many factories in operation. In 1854 the output of domestic sugar equaled the tonnage brought in from foreign countries and beet sugar had established itself throughout Europe as a strong competitor of the cane sugar of the colonies. The European consumption, however, had grown at such a rate that the domestic beet-sugar production did not keep pace with it, hence the cane manufacturer was scarcely sensible of the competition for some years; in fact Europe took rather more than less cane from the tropics for a time. During the nineteenth century Europe became less and less dependent upon the cane countries of the New world for its supplies. The abolition of slavery in most of the European possessions (1825-50), the development of the cultivation of cane in India and Java, and the expansion of the bounty-fed beet-sugar industry in Europe all contributed to bring this about and many colonial cane growers found themselves on the brink of ruin. Slavery, upon which cane sugar raising so greatly depended, was entirely abolished in British possessions in 1834, in France in 1848 during the Second Republic, in the Dutch West Indies in 1863, in Porto Rico in 1873, in St. Thomas in 1876, and in Cuba in 1880. Great Britain appropriated the sum of £20,000,000 sterling as an indemnity, and of this £16,500,000 went to West Indian planters, the remainder going to Mauritius and the Cape, but indemnification, while most welcome, did not restore the supply of labor. Many of the freed slaves refused to work and great numbers of them left the plantations. British colonists were at a serious disadvantage, too, as after their slaves were liberated slavery still existed in other West Indian islands, and to offset this a special import tax was imposed on sugar produced by slave labor.