It is. Roy. Soc. Edin. 



Vol. XLVII. 



Thomas R. Fraser and Mr Alister T. Mackenzie on Strophanthus sarmentosus : its Pharmacological Action 



and its Use as an Arrow-poison. — Plate II. 



Fig. 1.— Before Strophanthus. 

 Secondary coil at 120 mm. 



Fig. 2. — After Strophanthus. 

 Secondary coil at 120 mm. 



Fig. 3. — Secondary coil at 100 mm. 



Fig. 4. — Secondary coil at 100 mm. 



IG. 5. -Secondary coil at 100 mm. 



Fig. 6. — Secondary coil at 100 mm. 



Fig. 7."— Secondary coil at 80 mm. 



Time tracing 30 vibrations per second. 

 Experiment L. — Muscle Tracings, Extract of Strophanthus sarmentosus (1 in 1000). Reads left to right. 



