Arizona republican., 1916-05-07

out all unite in the "Quinner- -Stebbins' as the most necessary part of the plant The demonstration plant was watched with interest by numerous practical mining men, en- gineers of standing and experience men experienced in handling gravel and placer work in general, including | steam shovel and tram work. As was | to be expected in the construction of a | new plant mistakes were made and note made of them. and in the later plants corrected.
 one mistake was location of plant to transfer gravel economically, but the most important one was in the con- siruction of the "Ouinner' machine. To light to withstand the constant strain that this machine would be sub- ject 10 steady running at 1.0DO yards of gravel per day. The slugs. although interchangeable were made Of too soft material and the drum itself was not
 heavy enough To rectify this Chi cago firm is now putting on the mar
 liet what is called a Williams Quin-
 ner Pulverizer This machine is larg- CT. very heavy and substantially made.
 the slugs being much larger. heavier
 and greater in number, and made of tho best tungsten steel.
 To show the diversity of opinions regarding the gravel handling problem, one plant of I 900 yard capacity is be- ing erected upon a small hill about 75' vertical by the Plomosa Placer Co. The manager is well known and capable engineer The plan of thls company is to discard the steam shovel proposition, using tram with digger at tached, and works directly with top Of plant. while another drag tram takes care of the waste material dumping it | on opposite side of hill
 The Yuma Consolidated company on !, ad joining ground. a plant of 1000 yard l daily capacity vii luse the drag line 1 steam shovel. and transfer the gravel , to plant by the car and track method. ! The manager of this company is also i q very capable man, having years of ! experience in this business as well as ; being railroad man. and knowing l just what the cost must be to dig and l transfer the gravel by the method, his company will use.
 i The company who erected the dem
 oEstration plant will attempt a port 1 table plant -rectifying mistakes made ! and attempting an all together new proposition.
 l Note that each party has his own 1 idea ahort the transferring of the l gravel-each according 10 the lines 0: business that each has had exper- , fence in. The Plomosa company fol lowing the tram wethod in which i; 1 seems well experienced in, while the 1 Yuma company followed the car and | track system of the E. R. grade meth
 cd He being an old R. R. man. but l ooth methods seer to be good. and
 time will tell which plan is the best The portable plant can he said to bt an experiment in as much that it ha'
 ne,-er been tried out as has the othei methods.
 \ compressor and small air drill, l will constitute the cement breakins
 plant: crude oil will be the fuel a | present; estimated cost of handling
 the minimum IS cents and the max
 imum 20 cents per cubic yard Que plant. that of the Plomosa com pany will he in full operation by mid
 dle summer. the others by fall Tn delay in machinery seems to he tn chief drawback
 The Ia Pa2 company contemplated : wet plant, but indications now poin ! 10 d dry plant on the lines of eithe one Of the two stationery plants men l tioned
 In summing mp. it will be safe { ] say that year or two will see numer ous plants of this kind in tito | and in course of construction through out the entire southwest
 Regarding quartz mining in mort ! Yuma county. the Swansea Coppe
 I Co., which has one of the most com U plete smelting plants in Arizona wit large bodies of low grade copper or
 Of ferro manganese character hal | large crew of men al work Failu, @ obtain the proper fluxinc ort > caused them 10 close the smelter ft U The time being and for the pa:
 months have been shipping to neari
 smelters.
 -! Much activity in the many larl 9 loW-grade quicksilver and lead proper
 'ies IS also being exhibited. At Quart; ' site San Francisco company ha,
 taken over the Mariquita mine. fir located about 1865. as well as sever 1T adjoining large gold veins and ha, !. begun active development. as well ;
 the erection of plant in the valley. = In all. the prospects for the deve
 opment of this section Of the desc n never appeared brighter than at u ,t present tlme. and especially along Il r mes or successful dry placer mimi , on 2 large scale.
 ,t W. G. kEISER.