52 ■ Scientific Proceedings, Royal Dublin Society. 



Nothing of any certainty -was observed. I thouglit some of the 

 lines near D were thickened a little at their base, but I would not 

 place much reliance on the observation. The sun by this time was 

 getting very low, and the image of the planet was unsteady. If the 

 atmosphere of Yenus is about the same depth as the earth, it will ' 

 easily be seen that it would be an exceedingly thin ring round the 

 planet, and by placing the planet over half the slit it would be 

 most difficult to see the short absorption lines. My telescope being 

 a Cassagranian, and giving a large image of the planet, would 

 have a better chance than the Newtonian or Refractor. During 

 the forenoon the sun was observed on the chance of seeing a transit 

 of a satellite of Yenus with a negative result. 



