~I 
1898-99.] STRUQBURE, MICRO-CHEMISTRY AND DEVELOPMENT OF NERVE CELLS. 43 
EXPLAN AION OF PLAT EAN Gl 
Illustrating Mr. F. H. Scott’s paper “On the,Structure, Micro-Chem- 
istry, and Development of Nerve Cells, with special reference to their 
Nuclein Compounds.” 
Nore.—All figures were drawn to the same scale with the aid of Abbe’s camera 
lucida, as seen under the Leitz 1-12 homogeneous immersion lens, with compensation 
ocular 12 of Zeiss. 
Fic, 1.—Motor nerve cell of cat. Alcohol, eosin, and toluidin blue. 
Fic. 2.—Spinal ganglion cell of frog. Bichloride-bichromate, eosin, and toluidin blue. 
(To show the occurrence of granules in the Anura, as distinguished from 
= the Urodela.) 
Fic. 3.—Motor cell of cat. Alcohol, ammonium molybdate in nitric acid 7 hours, phenyl- 
hydrazin hydrochloride. 
Fic. 4.—Motor cell of cat. Alcohol, acid alcohol 5 hours, haematoxylin. 
Fic. 5.—Motor cell of Mecturus maculosus, Raf. Bichloride-bichromate, eosin and tolui- 
din blue. (Many cells have far more basophile substance in their nucleus 
than this one, which was selected to show the cytoplasm. It is the only 
cell in which anything like a fibrillar structure was observed.) 
Fic. 6.—-Motor cell of MWecturus. Alcohol, ammonium molybdate in nitric acid 7 hours, 
phenylhydrazin hydrochloride. : 
Fic. 7.—Motor cell of Necturus. Bichloride, acid alcohol 6 hours, potassium ferro- 
cyanide. 
Fic. 8.—Motor cell of eat. Alcohol, section digested in pepsin and hydrochloric acid 20 
hours, ammonium molybdate in nitric acid 12 hours, phenylhydrazin hydro - 
chloride. 
Fic. 9.—Motor cell of Mecturus. Alcohol, eosin and toluidin blue. 
Fics. 10 and 11.—Nuclei of motor cells of dog. Bichloride-bichromate, piece 4mm. 
thick treated with sodic hydrate 0.2% for 6 hours, section 0.5% gold chloride 
20 hours, formic acid very dilute in light, ro hours. 
Fic. 12.—Germinating cell, 7mm. pig. Bichloride-bichromate, eosin and toluidin blue, 
Fic. 13.—Germinating cell, 11mm. pig. Bichloride-bichromate, acid alcohol 6 hours, 
potassium ferrocyanide, eosin. 
Fic. 14.—Germinating cell, r1mm. pig. Bichloride-bichromate, acid alcohol 6 hours, 
hematoxylin, eosin. 
Fig. 15.—Neuroblast from t1mm. pig. Bichloride-bichromate, eosin and toluidin blues 
Fic. 16.—Neuroblast from t4mm. pig.  Bichloride-bichromate, eosin and toluidin blue. 
