[7] How Crops Grow. By Professor S. W. Johnson. Macmillan & Co. (Introduction, p. 4.)
[8] See p. 40 to 45.
[9] Elements of Agricultural Chemistry, in a course of Lectures for the Board of Agriculture. By Sir Humphry Davy. (London, 1831.)
[10] This department of agricultural research was subsequently carried on by Sprengel, Schübler, and others.
[11] Born in Paris, 1802; died 11th May 1887.
[12] See p. 40.
[13] While much of Boussingault's work was carried out previous to the year 1840, he continued to enrich agricultural chemistry with numerous valuable contributions up till the time of his death. It may be well here to mention the names of his most important contributions to agricultural science, made subsequent to 1840.
In 1843 he published, in a work entitled 'Economie Rurale,' the results of his numerous experiments and researches. This work is well known to English agriculturists from an English translation which appeared in 1845 (Boussingault's 'Rural Economy,' translated by G. Law. H. Ballière, London).
In 1860 appeared the first volume of his last great work, 'Agronomie Chimie Agricole et Physiologie' This work, which consisted of seven volumes, was not finished till 1884. He died on the 11th of May 1887. It may be added that the Royal Society of London awarded him the Copley medal in 1887.
[14] See British Association Proceedings, 1880, p. 511.