The Arizona sentinel., 1892-09-24

when softer varieties of steel are
 desired But there is another and
 a very important use to which the ores of manganese are applied, namely, for the manufacture of bleaching powder so extensiyelyused for bleaching linen and cotton goods For this, the purer varieties of ore only are used; and their value de- pends not so much on the per centage of metal which they con- tain, as upon the quantity of oxy- gen they can furnish when exposed to the action of acids, or what amounts to the same thing, the quantity of chlorine which they are capable of eliminating when treated with hydrochloric acid.
 Black oxide of manganese is also used to decolorize glass stained green by the presence of the prot oxide of iron. Its own amethy- stine tint is supposed to neutralize the optical effect of the greenish hue of the iron. The chemically prepared permanganate of potassa is used extensively as an antisep- tic. By analysis the above named manganese yields 63.4 ofmanganese and 36.6 per cent of oxygen. It is hard, steel-gray ore, resembling some of the magnetic iron ores and almost invariably found in the vicinity of hematite iron ores.
 found the umber vein too small to pay much attention to at the present writing, however, it looks as fine as any native umber in the market. There are largo beds of gypsum, but few miles from this place. Gypsum in it's natural state is compound of sulphuric acid and lime, with two equivalents of chemically combined water, and it has the following composition in one hundred parts:
 Lime 32.56 Sulphuric acid d........ .46.51 w dter ..ZU.90
 When heated to 272 F. the min eral loses it's water, and it is then known as plaster of Paris, which is extensively used in making casts and cornices. The value of gyp- sum in agriculture has been the subject of a great diversity of opinion, rather more with reference to the way in which it acts than on account of any doubt as to the beneficial results which follow its proper use.
 Liebig, the great agricultural chem- ist, says that the evident influence of gypsum upon the growth of grasses, the striking fertility and luxuriance of a meadow on which it is strewn, depends, in some degree, upon its fixing in the soil the ammonia of the atmosphere, which would otherwise be volatilized with the water which evaporates."
 It has been applied both directly as a fertilizer and indirectly in com post with ammoniacal and other manures. In each case the result has been beneficial, both by the direct supply of it's own material for the nourishment of plants and by it's in fuence upon the volatile carbonate of ammonia, whether in rain water or manure.
 I have just received word that Henry Zuner and a man named | Pump, have struck immensely rich | gold rock, in place, at a point in the mountains opposite the Eagle Eye, on the road to Vulture, about thirty miles north of this place. The for nation is granite with porphyritic states as selvages on the ore veins. The ore is ferrusginous, friable quartz, carrying free gold.
 Alexander Mckay and Mir. Davis, both of Tucson, have some excellent gold property D miles north of this place. They are preparing to carry water to the ground, by means of waterpipes, preparatory to erecting a mill this coming winter. Albert Vel don, also of Tucson, owns and IS operating a goed gold property about 6 miles north of Mckay and Davis property. Mir. W. is also preparing to erect a mill this winter.
 Messrs. Talbot. Gregory, Johnson and McLeish of Phoenix, were visitors here few days since. The two first named gentlemen are part owners Tn