191 



Physiologia. 



by a more or less prolonged tonus contr. Some land molluscs make an 

 exception to the second part of tlais statement. Tnnicates comport them- 

 selves in the way above mentioned. In Crabs and Octopus sometimes 

 tbere was dimin. amplitude in response to stimul. of increas. strength. 

 Staircase contraction of crustacean heart.] 

 699*Carlson, A. J. 11.12:2. 

 1906. Comparative Physiology of the Invertebrate Heart. — VIII. The 

 Inhibitory Effects of the Single Induced Shock. Amer. Journ. Physiol. 

 Vol. 16. p. 100 — 109, 5 figg. [Induced. sh. of certain intensity sent 

 through the pulsating heart at the beginning of systole diminishes the 

 strength of the beat already in progress without necessarily affecting the 

 tonus of the heart or strength or rate of following beats. Same shock when 

 applied to the heart towards end of syst, or during diastole and the diastol. 

 pause produces extra contraction. The systole (fîrst statement) may belong 

 to an artific. produced beat. — Inhib. effect of sing, induced sh. on tonus. 

 Molluscs and crustaceans.] 

 700*Carlson, A. J. 11.12:52. 

 1906. Comparative Physiology of the Invertebrate Heart. — IV. The Phy- 

 siology of the Cardiac Nerves in the Arthropods. Amer. Journ. Physiol. 

 Vol. 15. p. 127 — 135, 3 figg. Inhibitory and augmentor fibres come 

 chiefly from the thoracic and not from the cerebroid ganglia.] 

 l*Hérouard, E. 11.12 : 53.24 Daphnia. 



1906. La circulation chez les Daphnies. Mém. Soc. zool. France T. 18. 

 p. 214—232, 2 pis., 3 figg. 

 702*Carlson, A. J. 11.12 : 53.92 Limulus. 



1906. On the Cause of the Cessation of the Rhythm of Automatic Tissues 

 inisotonic Solutions of Non-Electrolytes. Amer. Journ. Physiol. Vol. 16. 

 p. 221 — 229, 2 figg. [Duration of maintenance of the activity of automatic 

 tissues in isot. sol. of non-electrolyt. (sugar. urea, glycérine) dépends on 

 condition of automat. tissues, and specif. nature of the non electrolytes 

 and not directly on the rate of diffusion of the electrolytes of plasma in 

 the intercellular Spaces into solution of non-el. It is therefore in part due 

 to some action of non-el. and autom. tissue. Cessation of rhythm in non-el. 

 is no argument in support of view that cause of rhythm of automat. heart 

 tissue is to be sought in electrolytes of plasma. Heart of Limulus.] 

 3*Carlson, A. J. 11.12 : 53.92 Limulus. 



1906. On the Chemical Conditions for the Heart Activity, with Special 

 Référence to the Heart of Limulus. Amer. Journ. Physiol. Vol. 16. 

 p. 378 — 408, 10 figg. [Action of blood sait on heart musc, of Limulus: 

 salts of Ca, Mg, K and NH4 depress without primary stimulation. Na salts 

 produce primarily slight augmentation in strength of contract. Salts of Na, 

 Mg, have same infl. on heart muscle as on h. ganglion, while K and NH4 

 salts produce qualit. différent effect on the 2 heart tissues. Limulus heart 

 compared with vertebrate heart. etc.] 

 704*Newman, H. H. 11.12 : 53.92 Limulus. 



1906. On the Respiration of the Heart. (With Special Référence to the 

 Heart oî Limulus.) Amer. Journ. Physiol. Vol. 15. p. 371—386, 6 figg. 

 [Heart ganglion is compar. indifferent to lack of O, much more résistant 

 than is the central nervous-system. H exercises favorable influence on 

 heart rhythm. Heart gangl. very sensitive to CO 2 (primär, stimul. followed. 



10. XI. 1907. 



