Weekly journal-miner., 1911-03-29
with the Roosevelt Irrigation Dam.
 The Per Cents of Increase.

' shows a considerable increase at the census of 1909 over that of 1904. Ranking the various items in per cent order of increase they appear as follows:
 Cost of materials used, 130 per cent; capital invested, 12s per cent; number of establishments, S4 per i cent; value of products, 7S per cent; number of salaried officials and , clerks, 70 per cent; salaries and wages, Il per cent; average number of wage-earners employed during the year 34 per cent; value added by
 manufacture. 9 per cent; and mis-
 cellaneOus expenses, l per cent.
 The number of manufacturing es-
 tablishments increased from 169 in
 1904 to 311 in 1909, a gain of 142,
 or s4 per cent.
 The capital invested, as reported
 in 1909, was s32, ,s75 ,OOO,a gain of $1S,479,OOO, or 12s per cent, over i $14 4,396,OOO in 1904
 ] The average capital per establish ment was approximately $106,O0O in ; 1909 and $S5,000 in 1904, an average
 gain per establishment of $21, ,00O. ] In this connection it should be stated that the inquiry contained in the census schedule calls for the total amount of capital, both owned and borrowed and invested in the busi- ness. but excludes the value of rented , property, plant, or equipment which
 was employed in the conduct of manufacturing enterprises. In the final bulletins and reports the rent al paid for such property will be shown separately.
 The cost of materials used in manufacture mas more than doubled, increasing from $14,595,00O in 1904 to $33,572,OOO in 1909, or I30 per cent. The increase is due to the copper smelting industry wherein the cost of materials used was 9,242,- GOO on 1909, and but $12,4S7. .OO0 in 1904, and increase of S16.755, ,0O0, or about 134 per cent. The average cost of materials per establishment for all industries was approximately Sl0S,000 in 1909 and SS6.OOO in 1904. | In addition to the component ma terials which enter into the products f of the establishment for the census year there are included fuel. rent of | power and heat, and mill supplies. | The cost of materials, however, does ,I supplies bought either for specula- tiOn or for use during a subsequent period.
 Value of Products.
 The value of products in 1909 was s50,074,OOO, and $29.OS3,O in 1904. an increase of $21, ,991 ,OOO, or 7s per cent. The average value of pro ducts per establishment, was about $l6l 900 in 1904, a decrease of about 3 per cent.
 The value of products represents their selling value or price at the plants as actually turned out by the factories during the census year. and does not of necessity have any re latiOn to the amount of sales for that year. The value under this head also include the amount receiv- ed for work done on materials fur nished by others.
 / Copper smelling, the chief indus try of the territory in 1909. amount ed to S4l,059,O0O, or s2 per cent of the entire products. This industry shows an increase in the value of products of so per cent over that reported in 1904
 Several of the industries. ranking next in importance by value of pro- ducts are: Cars and general shop construction and repairs by steam railroad companies, $2,394,OOO; flour and grist mill products, $1,317 ,OOO; and lumber and timber products, Sl,- O,OOO.
 Value Added by Manufacture.
 The value added by manufacture represents the difference between the cost of materials used and their value after the manufacturing processes have been expended upon them and they become products. In 1909 the value added by manufacture was $l6,5O2,OOO, and in 1904, $13,4Ss, ,OOO, an increase of $3,O14,OOO. or g per cent. The value added by manu- facture in 1909 was B per cent of the total value of products. while in 1904 it was 4S per cent.
 Miscellaneous expenses include such items as rent of factory or works, taxes, and amount paid for contract work, which will appear separately in the final reports, as well as such items of office and other expense as can not be elsewhere classified. In 1909 the amount of this class of ex- pense was $1,224,OOO and in 1904, $l,2OS,O0O, only a slight increase,