378 OETGnTAL AETICLES. 



Eesearches on the Grey Substance of the Spinal Chord. Philo- 



sopliical Transactions, 1859. -; 



B. Stfllen'g. — 1. Xeue TJntersuchtmgen iiber den Bau des Eacken- 



marks. Fiinf Lieferunc/en, FranJcfurt, 1S56-1S59. — 2. Atlas 



^Miki'oskopisch-Ajiatomischer Abbildungeu. Vie-r Lieferungen, 



1S56-1S59. 

 KoLLiKEE. — Manual of Human Histology. London (Sydenham 



Society), 1853. 

 Ph. Ows.iAy>'iKO"w. — Disquisitiones IMicroscopicse de MedulljD 



Spinalis textura, imprimis in piscibus facitatas. Dorpat. 1854. 

 !R. Wag>t:e.. — Xeurologische TJntersuchiingen. Gottingen, 1854. 

 J. Le>*ho3SEK. — Xeue TJntersuchungen iiber den feineren Ban des 



Centralen Xerven systems des Mensehen. Wien, 1858. 

 ScHEOEDEE TAX DEE KoLK. — On the Minuto Structure of the Spinal 



Cord, etc. London, 1859 {Neio Sydenliam Society). 

 Beow^t-Seqeaed. — Lectures on the Physiology and Pathology of 



the Central Xervous System. Philadelphia, 1860. 

 Fe. GrOLL. — Denkschi'iften der Mediz.-Chir. Gesellschaft d. Kanton 



Zurich. 1860. 

 J. B. Tease. — Contributions to the Anatomy of the Spinal Cord. 



San Francisco, 1860. 

 E. Eeissxee. — Beitrage zur Kentniss von Bau des Eiickenmarkes 



von Petromyson fluviatilis. Dorpat. 1860. 

 L. Steeda. — Ueber das Eiickenmark imd Einzelne Tlieile des Gehims 



Ton Esox Lucius. Dorpat. 1861. 

 J. DEA^f. — [Microscopic AnatomT of the Lumbar Enlargement of the 



Spinal Cord. Cambridge, U.S. 1861. 

 J. TEAroOTT. — Contribution a I'Anatomie ]\Iicroscopique de la 



moelle epiniere de la Grenouille. Quoted from the German, in 



Brown-Sequard's Journal de Physiologie, Janvier, 1862. 



The subject will be treated under the three heads of : — 



1. The structure of the white columns. 



2. The form and structure of the grey matter. 



3. The origin and course of the nerve roots. 



I. SxErCTUBE OF THE WhITE COLE3J3fS. 



The anatomical elements of the white columns present different 

 appearances, according as they are examined ia longitudinal or ia 

 transverse sections. 



A longitudinal section exhibits the general aspect of a structure 

 consisting of parallel fibres running lengthwise. A minute examina- 

 tion shows them, as described by IVIr. Lockhart Clarke, to consist of 

 nerve-fibres taking different directions, — transversely, olliqv.ely, and 

 longitudinally, together with blood-vessels and connective tissue. 



On tracing the transverse fibres, these are found to proceed from 

 the grey matter, or from the nerve-roots, and to form a kind of plexus 

 between bundles of the longitudinal fibres, with many of which they 



