
Accounting for the Industrial Revolution 25
thebreakthroughs in the fertiliser and dye industries in the second half
of the nineteenth century. There were a few famous breakthroughs, of
course, such as Leblanc’s soda-making process (1787), yet before Lavoisier
these all rested on slender or confused chemistry, and without further
breakthroughs would have run into diminishing returns.
The insights provided by the new chemistry, coupled to the economic
importance of mordants, dyes and soap for the growing textile industry,
were such that new work on the topic kept appearing. Among those,
the Art delateintureby Claude Berthollet (Lavoisier’s most illustrious stu-
dent) appeared in 1791, not many years after he had shown how chlorine
could be turned into an industrial bleaching agent (an idea promptly
appropriated by enterprising Britons, among them James Watt, whose
father-in-law was a bleacher). Berthollet’s book explained dyeing in terms
of chemical affinity and summarised the state of the art for a genera-
tion. He servedasdirectorofdyeingattheManufacture des Gobelins,and
his Statique chimique (1803) ‘was not only the summation of the chemical
thought of the entire eighteenth century . . . but also laid out the prob-
lems that the nineteenth century was to solve’ (Keyser 1990: 237). The
knowledge gathered by chemists and manufacturers formed the basis for
William Partridge’s APractical Treatise on the Dyeing of Woollen, Cotton and
Silk that appeared in New York in 1823 and for thirty years remained the
standard text ‘in which all the most popular dyes were disclosed . . . like
cookery recipes’ (Garfield 2001: 41). Berthollet’s successor at the Gobelins,
Michel Eugène Chevreul, was interested in lipids, discovered the nature
of fatty acids and isolated such substances as cholesterol, glycerol and
stearic acid. He discovered that fats are combinations of glycerol and fatty
acids, easily separated by saponification (hydrolysis) which immediately
improved the manufacture of soap.
18
Forsome reason, the European con-
tinent seemed better at producing advances in chemistry than Britain;
this seems to have bothered the British not one iota. They simply sent
their chemistry students to study across the channel, or imported the
best chemists to teach in Britain. Here as elsewhere during the Industrial
Revolution, the advances were pan-European.
In chemicals, much as was the case in mechanical devices, the bulk of
theinventions between Berthollet’s pathbreaking bleaching process (1785)
and the discovery of Aniline Mauve by Perkin in 1856 (which set into
motion the synthetic dye industry based on organic chemistry) were rela-
tively small microinventions. However, they rested on ever more chemical
knowledge and thus continued to pour forth, instead of slowly petering
out. Much of this knowledge was gathered by empirical experimentation
18
Clow and Clow in their classic account (1952: 126) assess that his work ‘placed soap-making
on a sure quantitative basis and technics was placed under one of its greatest debts to
chemistry’. His better understanding of fatty substances led to the development of stearic
candles, which he patented in 1825 together with another French chemist, Gay-Lussac. His
work on dyes and the optical nature of colours was also of substantial importance.
Cambridge Histories Online © Cambridge University Press, 2008