I have introduced into it merely such modifications as are necessary to render the apparatus entirely practical.

'I am myself inclined (p. 285) to admit unconscious mental modifications, in the only sense in which I can attach any very distinct meaning to themnamely, unconscious modifications of the nerves.

The nineteen millions of Treasury notes authorized by the act of Congress of 1837, and the modifications thereof with a view to the indulgence of merchants on their duty bonds and of the deposit banks in the payment of public moneys held by them, have been so punctually redeemed as to leave less than the original ten millions outstanding at any one time, and the whole amount unredeemed now falls short of three millions.

no further than that bare instance: because our understandings can discover no conceivable connexion between any secondary quality and any modification whatsoever of any of the primary ones.