The problem of synthetic rubber has then been solved scientifically but not industrially.
For thirty-seven hours now they had been working on a report of their investigations of synthetic rubber.
So it is evident that the supply of synthetic rubber could not have been adequate or satisfactory.
No one ever forgot the roly-poly pudding made without suet; synthetic rubber was its scientific name.
But a great deal of scientific effort resulted in no more than what, for instance, synthetic rubber has been.