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yet live. Of ova in general, in this connection, it i$ 

 said that they live or die according as the temperature 

 to which they are exposed differs little or much from 

 that which is natural to the organisms producing them. 

 In some, according to Max Schultze, even distilled 

 water is enough to arrest movement. Now, not to 

 dwell longer here, both amoeba and ova are to Mr. 

 Huxley pure protoplasm ; and such difference of result, 

 according to difference of temperature, etc., must as- 

 suredly be allowed to point to a difference of original 

 nature. Any conclusion so far, then, in regard to unity 

 of substance, whether the chemical composition or the 

 action of reagents be considered, cannot be said to bear 

 out the views of Mr. Huxley. 



What now of the unities of form and power in proto- 

 plasm ? By form, Mr. Huxley will be found to mean 

 the general appearance and structure ; and by faculty 

 or power, the action exhibited. Now it will be very 

 easy to prove that, in neither respect, do all specimens 

 of protoplasm agree. Mr. Huxley's representative pro- 

 toplasm, it appears, is that of the nettle-sting ; and he 

 describes it as a granulated, semi-fluid body, contractile 

 in mass, and contractile also in detail to the develop- 

 ment of a species of circulation. Strieker, again, 

 speaks of it as a homogeneous substance, in which any 

 granules that may appear must be considered of foreign 

 importation, and in which there are no evidences of cir- 

 culation. In this last respect, then, that Mr. Huxley 

 should talk of " tiny Maelstroms," such as even in the 

 silence of a tropical noon might stun us, if heard, as 

 " with the roar of a great city," may be viewed, per- 

 haps, as a rise into poetry beyond the occasion. 



Further, according to Strieker, protoplasm varies ak 



