Juday—Lakes in Central America . 223 
lake is said to have a maximum depth of 120 m. but only two 
soundings were made during this investigation. One near the 
middle of the lake showed a depth Of 110 m. while another 
nearer the southern shore also gave a depth of 110 m. 
The larger aquatic plants were unusually scarce along that 
portion of the shore which was examined. 
The depths are shown in meters. 
The water of this lake was the most transparent of the four, 
a Secchi’s disc 10 cm. in diameter just disappearing from view 
at a depth of 12.5 m. 
The water contains considerable mineral matter in solution as 
shown by the following analysis by Renson. 1 The results are 
stated in parts per million: 
Residue at 180°. 1063.0 
Si0 2 . 6.5 
Mg. 86.8 
Ca . 36.8 
1 Barherena, Monografias Departmental VI, Departmento de Santa Ana. 
1910, p. 13. 
