Note 23 — Chapter XXIX

The following patents, for the use of the Trinidad bitumen, were taken out by Lord Dundonald:—1851. "Improvements in the construction and manufacture of sewers, drains, waterways, pipes, reservoirs, and receptacles for liquids or solids, and for the making of columns, pillars, capitals, pedestals, bases, and other useful and ornamental objects, from a substance never heretofore employed for such manufactures."—1852. "Improvements in coating and insulating wire."—1852. "Improving bituminous substances, thereby rendering them available for purposes to which they never heretofore have been successfully applied."—1853. "Improvements in producing compositions or combinations of bituminous, resinous, and gummy matters, and thereby obtaining products useful in the arts and manufactures."—1853. "Improvements in apparatus for laying pipes in the earth, and in the juncture of such pipes."