48 Scientific Proceedings, Royal Dublin Society. 



2ii 22™ 16^ As I have stated, mucli uncertainty necessarily results 

 from the flickering motion of the cusps. 



During the whole time the planet was visible it appeared per- 

 fectly circular ; no deformity whatever, as ' black drop,' ' pear 

 shape,' &c. When once fairly on the disc of the sun I did not pay 

 much attention to any subsequent phenomena. Our Observatory 

 being situated within the College grounds, and being chiefly in- 

 tended for educational purposes, I was anxious to have our stu- 

 dents, as far as possible, see the transit. For this purpose the 

 image of the sun was thrown on a sheet of white paper by the 

 siderostatic telescope, the image being about 6 inches in diameter : 

 the image of the planet was very distinct, and over one hundred 

 individuals were thus enabled satisfactorily to see the transit. 



I should have stated that observations here made by the 

 siderostatic telescope, one before the junction of the cusps at 

 2^ 21™ 27% the other after the light of the sun was well seen 

 at the eastern side, 2"^ 22™ 20^ 



