“ The application of chemistry to agriculture, and to many of the wants of daily life, received so powerful an impulse from Liebig, that the popular mind has taken him for the representative of the science in its application to practical purposes. So great, indeed, has his fame become as a technologist, that writers in English newspapers have overlooked the fact that he was one of the greatest chemists of the century. ”

“ In 1831 the measurement of gases was a matter of much greater difficulty that it is to-day, and the advantage gained at that period, by making the common combustion not to involve a gaseous measurement, was more striking that it is at present. ”