114 THE CELL DOCTRINE. 



chemical action, electricity, magnetism, heat, light, 

 motion, and possibly other forces " contributing, in 

 the most complex manner, to sustain that result of 

 combined action we call life." 



ADDISON, WALLER, COHNHEIM (1842, 1846, 1867). 



At the annual meeting of the Provincial Medical 

 and Surgical Association of England, held at Exeter, 

 August 3d and 4th, 1842, William Addison read a 

 paper entitled "Experimental and Practical Re- 

 searches on the Structure and Eunction of Blood-cor- 

 puscles, on Inflammation, and on the Origin and Na- 

 ture of Tubercles in the Lungs." In the section " On 

 Pus-corpuscles," he says : " The colorless blood-cor- 

 puscles appear to form pus-corpuscles."- In the section 

 on " Inflammation," we find the following : " The cir- 

 culation in the web of a frog's foot was watched at 

 intervals for half an hour, and only a few lymph-glob- 

 ules were seen. A crystal of salt was applied, and 

 the examination continued : its first eftect was to 

 quicken the rate of the circulation ; this soon ceased, 

 and the blood became stationary, the vessels being 

 red and congested. In the capillaries contiguous to 

 the congested vessels, the blood was oscillating to and 

 fro ; a little further oft", the circulation was very quick. 

 In half an hour the number of lymph-globules had 

 increased considerably, and the circulation in the 

 congested vessels was resumed ; but the corpuscles 

 passing through them sometimes oscillated to and 

 fro, sometimes retrograded, and at others hurried or 

 darted through the vessels with the utmost velocity. 



