It is hard to imagine a better proving ground of the theory that ideas - even ostensibly abstract ones - are inextricably historical.
In addition to its exports, the industry provides a technological proving ground for textile machinery makers—another large exporting industry.
Suggestions are now produced of using an aerodrome as a proving ground.
It is a proving ground scheme which should not be judged until the financial reports on contracts undertaken by the new management are available.
It has been suggested, therefore, that a disused aerodrome, should, if possible, be purchased, or rented and converted into a proving ground.
It is no part of an airline's business to be a proving ground for any aircraft.
They say, as regards location, that no particular area of the country has yet been recommended for the location of a proving ground.
This requirement will be borne in mind in the selection of a site for the proposed proving ground.
