MINERAL WATERS AND BATES OF CEILE. 271 



deal of acid, the bones of animals that fall into them being dissolved in a few 

 months. There are old wells which assay from $5 to $1,200 to the ton. One 

 assay I made from the flat, half a mile from any spring, assayed $1,200 to 

 the ton. There is a great deal of salt, almost pure, all over the spring flat. 

 There are between 100 and 200 quartz leads discovered, running in two di- 

 rections, close to the spring. I find silver in several of them, all the way 

 from a few dollars to $100 to the ton. Some of these],leads run through the 

 springs, at least they point in that direction. The altitude of this place is 

 between 4,000 and 5,000 feet." 



Prof. Hanks also refers in his paper to the recent discovery of a peculiar 

 silver-bearing deposit located in Southwestern Utah. It occurs in the 

 "Maud Mine," six miles from Leeds. Some assays as high as $700 per ton 

 have been made. Instead of being sandstone, as supposed. Prof. Hanks 

 found the deposit to be sedimentary, but closely resembling the Oregon mud. 

 Under the microscope it has all the appearance of that strange substance. 

 The Oregon mud, if allowed to dry in large quantities, would soon form a 

 similar substance to the Utah mineral, in appearance at least. The silver 

 is in the state of chloride, and is seen under the microscope both amor- 

 phous and in crystals. An analysis of the two minerals will be interestino- 

 and may throw some new light on the subject. It is possible that a study 

 of these deposits may contribute much to our knowledge of the formation 

 of metalliferous veins. 



THE MINERAL WATERS AND BATHS OF CHILE. 



The Edinburgh Medical Journal has an article by Dr. John Boyd on the 

 "Medical Society of Chile," in the course of which the following account is 

 given of the medical springs of the country : 



Mineral Waters. — Chile possesses a great number of mineral and thermal 

 waters, but only a small proportion of these has been utilized for the benefit 

 of the sick. Almost all of them are found at the foot of the Andes, or on 

 its declivity; the most celebrated and most frequent being the followino- : 



1. The Baths of Chilian^ situated at 1,861 meters above the sea-level, in 

 a volcanic region, little distant from the perpetual snows. Of its various 

 affluents, the most im^^ortant is the sulphurous, the temperature of which 

 reaches 58° (136.4° Fahr,). From their high elevation, these are only acces- 

 sible during the summer months, and the accommodation for patients is 

 middling. In other respects, the access is sufficiently easy, 



2. The Baths of Cauguenes, on the banks of the river Cachapol, and at 

 677 metres above the level of the sea. They are alkaline waters, varying 

 in their temperatures in the various springs from 35° to 47° (95° to 116.6° 

 Fahr.). The establishment can vie in every respect with the most celebra- 

 ted in Europe. 



3. The Baths of Apoquindo, a few leagues to the east of Santiago, at a 

 height of 799 metres. They are equally alkaline, although less concentra- 



