82 VOLCANO POPOCATEPETL AND ITS VICINITY. 



Or, if all co-ordinates arc referred to the western peak of the Popocatepetl as 

 zero point, the results are as follows: 



Y t + West ) v ( + North J 



* ) East / X I South / 



POPOCATEPETL, Western peak 



Eastern peak . . - 2383 + 1041 



&quot; Pico del Fraile . . . + .1548 + 2572 



TLAMACAS, station A . . . + 603 +13193 



IXTACCIHUATL, Highest peak . . . + 5480 +54576 



&quot; South peak . . . + 2698 +49361 



&quot; station B . . +22123 +49254 



These co-ordinates, changed into minutes and seconds of arc, give the following 



GEOGRAPHICAL POSITIONS. 



Longitude. Latitude N. 



POPOCATEPETL, Western peak . . 0&quot;.0 19 49&quot;.2 



Eastern peak . . 24.8 E. 19 59.6 



&quot; Pico del Fraile . . 16 1 W. 19 1 14.7 



HANCIIO TLAMACAS . . .6.3 W. 19 3 0.0 



IxTACCinuATL, Highest peak . 57.1 W. 19 9 50.2 



&quot; South peak . . 28.1 W. 19 8 58.5 



&quot; station B 3 50.7 W. 18 8 57.4 



