28 



REPORTS ON THE STATE OF SCIENCE. 



in order to permit of those taking part in the ascents attending the 

 meeting of the Association at Portsmouth. 



Arrangements have been made for further ascents from Mungret 

 College during that week. 



Results of Balloon Ascents in Ireland, 1910-11. 



lOO° 



ew 



140° 250° 



Temperature in Degrees Absolute. 



280° 



JOO° 



It is desirable that observations of pilot balloons should be obtained 

 in Ireland in addition to the records from registering balloons, and the 

 Committee recommend reappointment, with a grant of 50?., to permit 

 of this extension of the work. A special theodolite, costing about 30?., 

 is necessary for the observations. The additional outlay on balloons 

 and hydrogen for the pilot-balloon observations would be comparatively 



small. 



In the Table pressure is expressed in megadynes per cm 2 , tempera- 

 ture in degrees Centigrade above the absolute zero — 273° on the 

 ordinary scale. H c is the height and T c the temperature at which 

 temperature begins to be practically constant in a vertical direction. 



