MORBID ANATOMY OF LEAD PARALYSIS 225 
In our case tliey were quite unaltered, presenting tlie normal features pointed out by 
Sherrington. Owing to the atrophy of the surrounding mviscles the spindle fibres were now 
considerably the largest seen. The intrafusal fibres retained their striation, and at the equatorial 
zone of the spindle showed the usual numerous central nuclei. 
Fig. I 
In every case the nerves in the spindles were normal (Fig. 3). 
Spinal Cord. — Pieces of the spinal segments from the IVth cervical to first dorsal were 
examined by the Marchi and Weigert methods of staining and were found to be throughout 
normal. The IVth to Vllth segment inclusive were also stained by the methylene blue and 
erythrosin method of Held* for the purpose of studying the condition of the nerve cells. In the 
IVth and Vth segments nearly all the cells showed the usual normal structure, witli a central 
nucleus and a definite distribution of the chromatic masses, giving to the cells generally tlie 
well-known striated appearance. A few, however, showed changes similar to those found in the 
* Warrington, 'Journal of Physiology,' xxiii, 1898. 
2 D 
