836 i General Notes. [August, 
groups, the action of substances in the same isomorphous groupis 
a function of the atomic weight, the greater the atomic weight 
the smaller the quantity required to produce the same physiologi 
cal action.” The author divides the chemical elements into ten 
groups, in each of which, among the metals, with one exception, 
the salts are isomorphous and have characteristic physiological 
actions which are described in detail.—//. of Physiology, Vil. Y, 
No, z. 
THE ACCELERATOR AND INHIBITORY NERVES OF THE HEART OF 
conduction power of the muscular tissue. Such Opposing ita | 
are evidently due to one of two causes, either (1) to the J aa 
to inhibit the cardiac functions according to varying condit 
: veen 
of the nerves or of the heart itself. In order to deride S 
iy inhibitory: 
ned on Y eniai 
m closely 
i were 
fully answered; the accelerator nerves of t : : 3 
main sympathetic chain at a large ganglion corresponding td : 
rently to the ganglion stellatum of warm-bloodec ae cava, 
accompany the vertebral artery up to the ur yein anas 
where they leave the artery and passing alongside t ood of the 
tomose with branches of the vagus in the neighbo of the ah 
. heart. Stimulation of these nerves increases the rate oF : 
