The Mexican mining journal . r by means of a countershaft. The precipitate pump has an individual motorof 5 h. p. capacity. All water used about the mill comes from the minepump:-;. Plans and Construction. The preliminary plans and experiments tor La Lu-cha cyanide mill were made by the firm of Grothe & May. 1915, THE MEXICAN MINING JOURNAL. 164 Carter some time ago. When it was definitely decidedin the spring of 1913 to proceed with constructionthese plans were completed in detail under the super-vision of T. E. Pratt, engineer for the Victor M. Bras-chi Machinery Co., which firm supplied all
The Mexican mining journal . r by means of a countershaft. The precipitate pump has an individual motorof 5 h. p. capacity. All water used about the mill comes from the minepump:-;. Plans and Construction. The preliminary plans and experiments tor La Lu-cha cyanide mill were made by the firm of Grothe & May. 1915, THE MEXICAN MINING JOURNAL. 164 Carter some time ago. When it was definitely decidedin the spring of 1913 to proceed with constructionthese plans were completed in detail under the super-vision of T. E. Pratt, engineer for the Victor M. Bras-chi Machinery Co., which firm supplied all of the ma-chinery. No data as to the operation of the mill are as yetavailable, further than that a profit was realized thefirst month, and that the margin has steadily increased. The ore is quartz carrying sulphides. The veins occurin andesite. The sampling of lode No. 45, which is the main lodein the mine, showed an average of 180 grams of silverand grams of gold. However, the richest ore car-ries 300 grams Flow Sheet of La Lucha Mill r/ /r v There are three other lodes in the claims on whichsome development work has been done. These arethe Temascales with an average width of one meterand content of one kilo of silver, the Remedios whichhas an average width of V/-¿ meters and from 1 to 15¡?rams of gold and the Ocotes has an average width>i one meter, and it is unimportant as far as its pre-sent values are concerned. The shaft is 137 meters deep and is equipped withi 45 «jingle drum Denver Engineering Works hoist,The pumping equipment consists of an Aldrich verti-cal triplex pump with a h p. motor. Vanadium Discovered by a Mexican. In 1801 Andres Manuel del Rio, a professor of mi-neralogy in the Royal School of Mines of the City ofMexico, in examining some brown lead ores from themines of Zimapan, Hidalgo, believed that he haddiscovered a new element different from chromiumand uranium, and this he named eritronium. It wasin reality what we now know as va
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