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              44
istered at the time.
    After a great many experiments of this kind, the conclusions which were finally reached were as follows:-
   1). Atropine, homatropine, hyoscine, hyoscyamine and daturine are stimulants of the sympathetic nerve-apparatus of the heart.
  2). The vasomotor portion of this nerve-apparatus is affected by comparatively small doses of these drugs, giving rise to either acceleration or augmentation of the hearts' action.
  3). The inhibitory portion is excited by larger doses only, giving rise to slowing of the hearts' action,and, finally, causing diastolic arrest.
  4). The muscular substance of the heart is greatly excited by atropine, homatropine and daturine, and only slightly so by hyoscine and hyoscyamine.