The Daily Telegraph
THREE TESTS TO ESTABLISH TRUTH
Einstein’s theory requires three things to establish it fully as truth; three consequences that result from its acceptance must be proved.
It must account for certain irregular movements of the plant Mercury which are not explainable under Newtonian laws: and this it has done. It must be supported by evidence of displacement of lines in the spectrum; and this, according to enthusiasts, is already established, though the more cautious scientists submit that more investigation is yet required before the question is taken as settled. It must, thirdly, be shown that light is influenced by gravitation, as are the substantial material bodies. Newton admitted that light might be subject to gravitation, but Einstein requires that light passing near a great material body like the sun on its journey towards earth is deflected from the straight line to nearly double the extent that Newton’s law of gravitation, if applicable, allows.