238 THE DEVELOPMENT OF THE CHICK 
there bifurcates, producing two branches, one of which grows 
towards the head and the other towards the tail in the dorsal 
mils) 
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5 
Fig. 142. — Six centripetal axones of the dorsal 
root, rigorously copied from a good preparation 
prepared according to the method of Golgi. 
From a longitudinal and tangential section of 
the dorsal column of the spinal cord of an 8- 
day chick. (After Ramon y Cajal.) 
Col., Collaterals. 1, 2, 3, 4, 5, 6, the axones 
entering the cord. 
column of the white matter. The ascending and descending 
branches send off lateral branches, collaterals, which pass deeper 
into the cord, and ramify in the gray matter of the dorsal horn. 
