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Memoirs of the National Academy of Sciences . enth second) for the regulation of thechronoscope. In two other directions, however, experimentshave been begun with the instrument. Electric shocks areproduced separated by (say) 10 a. These shocks are appliedto the nerve at varying distances from the brain, the eailiershock having farther to travel. When the shocks are feltsimultaneously we have measured the time it takes to travelthe distance between tlie two contacts. This method involvesseveral psychological difticulties, but we hope to secure resultssupplementary to those given in this paper.
Memoirs of the National Academy of Sciences . enth second) for the regulation of thechronoscope. In two other directions, however, experimentshave been begun with the instrument. Electric shocks areproduced separated by (say) 10 a. These shocks are appliedto the nerve at varying distances from the brain, the eailiershock having farther to travel. When the shocks are feltsimultaneously we have measured the time it takes to travelthe distance between tlie two contacts. This method involvesseveral psychological difticulties, but we hope to secure resultssupplementary to those given in this paper. In the secondplace the instrument has been used to uncover any object andregister the instant at which this occurs. Thus a printedword may be covered by the screen and the screen be allowed y,„ ^ to fall. The instant the word becomes visible a current is closed and the time recorded. Thus the time required to see the word, for the association of ideas,etc., may be measured. The special experiments now in progress consist of uncovering two.
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Keywords: ., bookcentury1800, bookdecade1890, bookidmemoirsofnat, bookyear1895