Besides the coloni there were on a great estate - and those of the 4th century were on a specially large scale - a number of praedial slaves, who worked collectively under overseers on the part of the property which the owner himself cultivated.
This was first done on a large scale in 1803, when by a recess of the imperial diet many of the smaller fiefs were mediatized, in order to compensate those German princes who had been forced to cede their territories on the left bank of the Rhine to France.
In short, there is the greatest difficulty in freeing milk on a large scale from germs without at the same time seriously prejudicing its flavour and nutritive value.
The abundance in which iron is found in so many places, its great strength, its remarkable ductility and malleability in a red-hot state, and the ease with which two heated surfaces of iron can be welded together under the hammer combine to make it specially suitable for works on a large scale where strength with lightness are required - things such as screens, window-grills, ornamental hinges and the like.
From an early period bronze and latten (a variety of brass) were much used in England for the smaller objects both of ecclesiastical and domestic use, but except for tombs and lecterns were but little used on a large scale till the r6th century.
Beside the political and commercial pre-eminence which he conferred upon Samos, Polycrates adorned the city with public works on a large scale - an aqueduct, a mole and a temple of Hera (see SAMOS; AQUEDUCTS).
Another process, photoor heliogravure, for obtaining an engraved image on a copper plate, was for the first time employed on a large scale for producing a new topographical map of the Austrian Empire in 718 sheets, on a scale of I: 75,000, which was completed in seventeen years (1873-1890).
They are used on a very large scale in the vicinity of oil mills in southern cities like Memphis, New Orleans, Houston, and Little Rock, from Soo to s000 cattle being often collected in a single yard for this purpose.
Machine-making on a large scale is carried on by firms widely celebrated for the construction of locomotives, railway trucks and carriages, steamboilers and motors, turbines, pumps, metal bridges and roofs.
In mining operations explosives are used on a large scale and the powder gases contain large quantities of the very poisonous gas, carbon monoxide, a small percentage of which may cause death, and even a minute percentage of which in the air will seriously affect the health.