the chain of automatic movements which resulted in his seating himself at the table. The weapon called into new life the well-known acts of the battle-field. The spade brought back the day when, innocent of blood, he cultivated the vineyards of sunny France. In both the dog and the man just spoken of the control of the will over the emotions and mental acts was evidently lost, and the mental functions were performed only in obedience to impulses from without--i.e. were automatic. The human brain is a complex and very delicate mechanism, so uniform in its actions, so marvellous in its creation, that it is able to measure the rapidity of its own processes. There are scarcely two brains which work exactly with the same rapidity and ease. One man thinks faster than another man for reasons as purely physical as those which give to one man a faster gait than that of another. Those who move quickly are apt to think quickly, the whole nervous system performing its processes with rapidity. This is not, however, always the case, as it is possible for the brain to be differently constructed, so far as concerns its rapidity of action, from the spinal cord of the same individual. Our power of measuring time without instruments is probably based upon the cerebral system of each individual being accustomed to move at a uniform rate. Experience has taught the brain that it thinks so many thoughts or does so much work in such a length of time, and it judges that so much time has elapsed when it has done so much work. The extraordinary sense of prolongation of time which occurs in the intoxication produced by hasheesh is probably due to the fact that under the influence of the drug the brain works very much faster than it habitually does. Having produced a multitude of images or thoughts in a moment, the organ judges that a corresponding amount of time has elapsed. Persons are occasionally seen who have the power of waking at any desired time: going to bed at ten o'clock, they will rouse themselves at four, five or six in the morning, as they have made up their minds to do the previous night. The explanation of this curious faculty seems to be that in these persons the brain-functions go on with so much regularity during sleep that the brain is enabled to judge, though unconsciously, when the time fixed upon has arrived, and by an unconscious effort to recall consciousness.