SOME EXPERIMENTS OF LUTHER BUR BANK. 225 



appearing when the right cross brings it out; or it may appear under 

 specially favorable or peculiar conditions of growth." 



According to Burbank, " the facts of plant life demand a kinetic 

 theory of evolution, a slight change from Huxley's statement that 

 ' matter is a magazine of force,' to that of matter being force alone. 

 The time will come when the theory of ions will be thrown aside and no 

 line left between force and matter. We can not get the right per- 

 spective in science unless we go beyond our senses. A dead material 

 universe moved by outside forces is in itself highly improbable, but a 

 universe of force alone is probable, but requires great effort to make it 

 conceivable, because we must conceive it in the terms of our sense ex- 

 perience.' 



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