1868.] 



On some Parts of the Surface of the Moon. 



231 



function being to receive lymph on the one hand, and to propel it into the 

 great vein of the tail on the other, but that, besides this function, it at the 

 same time performs the secondary one of accelerating and promoting the flow 

 of the blood in the great caudal vein in its course back to the blood-heart. 



So far as the author has been able to ascertain, no one has hitherto given 

 a correct explanation of the phenomenon of small drops of blood propelled 

 in rapid succession, as if from the caudal heart, along the caudal vein. 

 "Without first showing that these small drops of red blood are ?^o^ propelled 

 fro7n the caudal heart, and without showing that it is colourless lymph 

 alone which is really propelled therefrom, no one could be warranted in 

 dissenting from Dr. Marshall Hall, the discoverer of the caudal heart, in 

 his opinion as to the nature of the organ, viz. that it is an auxihary blood- 

 heart, or in pronouncing it, how correctly soever, to be a lymphatic heart. 



January 16, 1868. 



Lieut. -General SABINE, President, in the Chair. 



The following communication was read : — 



Notices of some Parts of the Surface of the Moon, illustrated by 

 Drawings. By John Phillips, M.A., D.C.L., F.U.S., F.G.S., 

 Professor of Geology in the University of Oxford. Received 

 January 9, 1868. 



(Abstract.) 



My first serious attempts to portray the aspect of the moon were made 

 with the noblest instrument of modern times, the great telescope of Lord 

 Rosse, in 1852. The mirror was not in adjustment, so that the axes of the 

 incident and reflected pencils of light were inclined at a very sensible 

 angle. This being' met by a large reduction of the working area of the 

 mirror, the performance was found to be excellent. I have never seen some 

 parts of the moon so well as on that occasion. But when I came to repre- 

 sent what was seen, the difficulty of transferring from the blaze of the 

 picture to the dimdy lighted paper, on a high exposed station, with little 

 power of arranging the drawing-apparatus, was found to be insuperable, 

 and the effect was altogether disheartening. It was like setting down 

 things ex memorid, to give the rude general meaning, not like an accurate 

 and critical copy. I present as a specimen of this memorial a sketch of 

 the great crater of Gassendi (No. 1). 



I next mounted, in my garden at York, a small but fine telescope of 

 Cooke only 2*4 inches in the aperture ; and, aware of the nature of the 

 difliculty which" beset me at Birr Castle, I gave it an equatorial mount- 

 in-z', without, however, a clock movement. The whole was adapted to a 

 large solid stone pillar in the open air. It was not possible, with -^jj of 

 the light of the Ptosse mirror, to see so v/ell ; but it was easy to represent 

 far better what one saw, with a conveniently placed board to hold the draw- 



y2 



