2IO THOMPSON YATES LABORATORIES REPORT 
3. The fate of such altered cells and the ultimate condition of the nucleus of origin are 
not yet definitely ascertained. 
4. The age and nature of the animal experimented on, is a factor in determining the 
rapidity and degree of alteration met with in the nerve cells. 
Plate XI 
(Drawings m.ide with the camera lucida. Magnification — apochromatic system 3.0 mm. Apert. 
1.40. Compensating Oc. 12.) 
Fig. I. A normal anterior cornual cell. 
Fig. 2. Anterior cornual cell 14 days after section of the corresponding anterior root. 
Fig. 3. A cell from the postero-lateral group of the anterior horn 23 days after section of several 
posterior roots of the cauda equina. 
