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NOTES ON THE VOLCANO OF TUXTLA (or San Martin) VERA CRUZ, Mexico. 
May 11-13, 1894. 
E. W. Nelson. 
GENERAL NOTES 
This mountain is a low peak, having an altitude of about 5&50 
feet according to my aneroid. It is situated close to the coast of the 
Gulf of Mexico and forms the northern extremity of the low range of 
mountains which borders the Gulf from the Isthmus of Tehuantepec nearly to 
the Bay of Alvarado. The volcano is at the end of a high, sharp ridge of 
lava and volcanic ashes which extend away to the southeast. The volcano 
is now quite extinct and is completely covered with vegetation. There are 
two craters partly merged into one another and both easily accessible. 
There are recorded two eruptions here. One in I 664 and another in 1793 . 
Our route to ascend this peak was northeasterly from San Andres Tuxtla. Be¬ 
tween San Andreas and the summit of the Mountain there is no water available, 
so that the entire supply was carried on mens’ backs. We ascended a sharp 
slope am til we reached an altitude of about 1000 feet above the town and 
then advanced over a sloping plain for about five miles to the base of the 
ridge extending southeast from the peak. Ascending this we camped on the 
ridge and sent back our horses. From this point the local authorities had 
caused a trail to be cut through the dense jungle to the top of the 
mountain, about 6 miles away, in order to facilitate my ascent. The road 
led along a sharp ridge, through dense thickets to the summit. Our return 
was directly down the southwestern side of the volcano in a newline, which 
I caused my men to take. The sloping plain ends at the base of the main 
