



Table V. 









I. 



ii. 



in. 



IV. 



v. 



Douce, .... 

 Sugar Loaf, . 

 Howth,. . . . 



398-84 



275-32 



93-24 



403-83 



277-88 



94-61 



401-70 

 263-03 



90-84 



406-73 



265-45 



92-17 



397-33 



27517 



93-83 



Column I., which is only corrected for temperature, is 

 almost the same as V., and the figures in column II. are greater 

 than V. 



I shall add to these observations of my own three observa- 

 tions of the same height made by the Rev. Professor Jellett in 

 the neighbourhood of Zermatt. I have calculated the two fol- 

 lowing Tables from the figures furnished by his note-book : — 



The lower station is at Zermatt, the upper at the Schwarz- 

 see: — 



Table VI. 



No. 



Lower Station. 



Upper Station. 



Therm. 

 Coeff. 



Hyg. 

 Coeff. 



Range. 



1 



2 

 3 



24*856 

 24-880 

 24-853 



/ 

 0-379 

 0-355 

 0-263 



* 

 59-5 

 59-5 



57 



22- P 128 

 22-207 

 22-158 



/' 

 0-294 

 0-260 

 0-190 



t 



53 

 50 



58 



1-049 

 1-046 

 1053 



1-014 

 1-013 

 1010 



+ 053 

 -•046 

 -•024 



The heights calculated by the four formulae from these 

 figures are — 



Table VII. 





I. 



II. 



III. 



IV. 





1 



I 



529-63 

 516-30 

 524-90 



53704 

 52301 

 530-15 



520-56 

 504-52 

 515-63 



527-85 

 511.08 

 520.78 



Fine. 

 Fine. 

 Fine. 



Mean. . 



523-61 



530-06 



513-57 



519-903 



In this Table, the reduction of heights by formula III. is 

 very striking; it is also remarkable that No. 3 of column II., 



