Yet Lawsham would not have started his extensive experiments without qualified assistants.

The French had already conducted extensive experiments with solar Montgolfieres, performing over 30 flights from the late 1970s into the early 1990s.

Under his leadership, there were introduced a number of new plants whose hardiness and value for cultivation was tested in extensive experiments.

A more extensive experiment conducted by Kleiman (1975) confirms this result for skilled readers.

However, extensive experiments with it also failed to reproduce the described intensity of Greek fire.

The second, travelling wave, has the weight of von Békésy's extensive experiments behind it.

He has conducted extensive experiments in the Physical Acoustics Laboratory of the institute.

The use of any artificial organ by humans is almost always preceded by extensive experiments with animals.

While Oparin himself was unable to do extensive experiments to investigate any of these ideas, scientists were later able to.

But initially there were too few for extensive experiments.