Total Solar Eclipse of 1901, May 17-18. 209 



Addendum on the Pyramidal Tracts. By C. S. SHERRINGTON. 



The spinal degeneration resulting from ablation in the precentral 

 gyms of the above-mentioned "hand "-area, discovers in the anthro- 

 poid cord the human feature of a perfectly large direct ventral 

 (Tiircksbiindel) as well as crossed pyramidal tract. The relative sizes 

 of these tracts seem about the same as in man. 



The homolateral or uncrossed lateral division of the pyramidal tract 

 is also well seen. The crossed pyramidal degeneration from the hand 

 area lesion is clearly traceable down to the lumbar region of the cord. 

 In the lowest brachial segments there is obvious degeneration of fibres 

 in the grey matter of the ventral horn of the crossed side. Some of 

 the large nerve-cells there seem also degenerate. 



A lesion at the top of the gyms precentmlis gave no ventral pyra- 

 midal tract degeneration, and only a very slight uncrossed lateral 

 pyramidal, although an extensive crossed lateral, that descends the 

 whole length of the cord. 



" Total Solar Eclipse of 1901, May 17-18. Preliminary Report of 

 the Observations made at Ayer Karoe, Sawah Loento, 

 Sumatra." By H. F. NEWALL, M.A. Received October 30, 

 Read at Joint Meeting of the Royal and Royal Astronomical 

 Societies, October 31, 1901. 



This expedition was one of those organised by the Joint Permanent 

 Eclipse Committee of the Royal Society and Royal Astronomical 

 Society, funds being provided from a grant made by the Government 

 Grant Committee. 



It was originally contemplated that the party should consist of 

 Professor H. H. Turner and myself, and that we should occupy a 

 station inland in Sumatra ; but when the former found himself unable 

 to join in the expedition, it was decided not to appoint another 

 observer in his stead, nor to fix upon the station to be occupied until 

 there was an opportunity of learning about local conditions on 

 the spot. 



The expedition was to go to Padang, on the West Coast of Sumatra, 

 and to this port I travelled in company with Mr. F. W. Dyson, who 

 went out from the Royal Observatory, Greenwich. It was decided 

 that we should travel out together, prepared either to join forces at one 

 and the same camp, or to form two camps separated by a considerable 

 distance, and our ultimate decision was to depend upon information 

 which we expected to get from the Dutch authorities. 



I had communicated with Major Muller, the Chief of the Survey 



VOL. LXIX. Q 



