The employment of agricultural machines received considerable impetus from the Great Exhibition of 1851.
The idea of connecting volume and weight has received an immense impetus through the metric system, but it is not very prominent in ancient times.
Additional impetus was also lent by the revolution of 1848.
The impetus of this remarkable movement of expansion not only carried German trade to the East and North within the Baltic basin, but reanimated the older trade from the lower Rhine region to Flanders and England in the West.
Lessing had given the first impetus to the formation of a national literature by exposing the folly of the current imitation of French writers.
The unification of the peoples of antiquity in the Roman Empire, and the resultant amalgam of religions, gave a powerful impetus to the custom.
The system of the Welsh circulating charity schools, set up by Griffith Jones, rector of Llanddowror, in the 18th century, undoubtedly gave an immense impetus to the spread of popular education in Wales, for it has been stated on good authority that about one-third of the total population was taught to read and write Welsh by means of this system.
Another artery of trade of great importance is the Erie Canal, which here has its western terminus, and whose completion (1825) gave the first impetus to Buffalo's commercial growth.
Since Metchnikoff's introduction (see Longevity) of the use of soured milk for dietetic purposes-the lactic acid bacillus destroying pathogenic bacteria in the intestine-a great impetus has been given to the multiplication of laboratory preparations containing 'cultures of the bacillus; and in recent years much benefit to health has, in certain cases, been derived from the discovery.
Systematic conservancy of the Indian forests received a great impetus from the passing of the Forest Law in 1878, which gave to the government powers of dealing with private rights in the forests of which the chief proprietary right is vested in the state.