144 



Lieut.-Gen. R. Strachey. 



[Dec. 13, 



of the globe, which will make the investigation of this somewhat 

 remarkable phenomenon more complete, yet those we now have are 

 sufficient to justify an attempt being made to bring the more im- 

 portant facts before the Royal Society without further delay. 



The following table shows the stations from which the records have 

 been received of which use has been made in this discussion, with 

 certain particulars of their geographical position, and of their distances 

 measured on great circles, from Krakatoa, the place of eruption : — 



Table L 









Distance from Krakatoa, 









measured on a great circle. 



Place; 



Longitude.. 



Latitude. 













From west 



From east 









to east. 



to west. 















1 W. 79 15. 



N. 43: 40 



217 45 



142 15 





„ 10 18 



„ 51 55 



249 31 



110 29 





„ 8 24 



„ 40 13 



247 58 



112 2 





„ 6 39 



„ 54 21 



252 17 



107 43 





„ 5 4 



„ 50 9 



252 15 



107 45 





„ 4 18 



„ 55 53 



253 57 



106 3 





„ 2 28 



„ 53 51 



254 34 



105 26 





» 2 6 



„ 57 10 



255 25 



104 35 



Kew 



,. 19 



51 28 



255 27 



104 33 





,,oo 



,. 51 29 



255 39 



104 21 





E. 2 20 



„ 48 50 



256 49 



103 11 





„ 4 20 



„ 50 51 



258 17 



101 43 





„ 30 20 



„ 59 56 



272 3 



87 57 





„ 105 22 



S. 6 9 







As the earlier disturbances, on the 27th and 28th August, extend 

 over several hours, it became necessary to fix on certain sufficiently 

 well-defined points in the curves representing the barometric pres- 

 sure, from which to measure the epochs of the passage of succes- , 

 sive disturbances - The first and second of the series are, in almost 

 all the curves, well defined and generally similar in form, commencing 

 with a distinct rise, which is again followed by a distinct fall, the fall 

 being shorter than the rise. These features are followed by a less 

 definite rise succeeded by a shallow fall, after which there is again a 

 rise, which gradually passes into the more regular trace. 



The third and fourth of the disturbances can be traced in all the 

 curves, but they no longer exhibit the same characters, and are usually 

 nothing more than a sudden sharply defined rise, though in front of 

 some of these there is a more or less distinct trace of a hollow. 



The fifth and sixth of the series become less distinct and are lost at 

 several stations, being usually rises ; while a seventh faint dis- 



