Any one who reads Professor Allman’s address above referred to with due care will see that he was uneasy about protoplasm, even at the time of its greatest popularity. Professor Allman never says outright that the non-protoplasmic parts of the body are no more alive than chairs and tables are. He said what involved this as an inevitable consequence, and there can be no doubt that this is what he wanted to convey, but he never insisted on it with the outspokenness and emphasis with which so startling a paradox should alone be offered us for acceptance; nor is it easy to believe that his reluctance to express his conclusion _totidem verbis_ was not due to a sense that it might ere long prove more convenient not to have done so. When I advocated the theory of the livingness, or quasi-livingness of machines, in the chapters of “Erewhon” of which all else that I have written on biological subjects is a development, I took care that people should see the position in its extreme form; the non-livingness of bodily organs is to the full as startling a paradox as the livingness of non-bodily ones, and we have a right to expect the fullest explicitness from those who advance it. Of course it must be borne in mind that a machine can only claim any appreciable even aroma of livingness so long as it is in actual use. In “Erewhon” I did not think it necessary to insist on this, and did not, indeed, yet fully know what I was driving at. The same disposition to avoid committing themselves to the assertion that any part of the body is non-living may be observed in the writings of the other authorities upon protoplasm above referred to; I have searched all they said, and cannot find a single passage in which they declare even the osseous parts of a bone to be non-living, though this conclusion was the _raison d’être_ of all they were saying and followed as an obvious inference. The reader will probably agree with me in thinking that such reticence can only have been due to a feeling that the ground was one on which it behoved them to walk circumspectly; they probably felt, after a vague, ill-defined fashion, that the more they reduced the body to mechanism the more they laid it open to an opponent to raise mechanism to the body, but, however this may be, they dropped protoplasm, as I have said, in some haste with the autumn of 1879. Chapter X The Attempt to Eliminate Mind