The towns of the Red River Valley, which are nearer to the great wheat belt, give promise of developing into great flouring cities.
Among the other manufactories are flouring and grist mills, planing mills, foundries, and factories for making agricultural implements, United States mail boxes, furniture, pianos, organs, automobiles, toys and electrical supplies.
One of the greatest difficulties in the treatment of gold by amalgamation, and more particularly in the treatment of pyrites, arises from the so-called " sickening " or " flouring " of the mercury; that is, the particles, losing their bright metallic surfaces, are no longer capable of coalescing with or taking up other metals.
It is also stated that sodium prevents both the " sickening " and the " flouring " of the mercury which is produced by certain associated minerals.
The addition of potassium cyanide has been suggested to assist the amalgamation and to prevent " flouring," but Skey has shown that its use is attended with loss of gold.
Among Davenport's manufactures are the products of foundries and machine shops, and of flouring, grist and planing mills; glucose syrup and products; locomotives, steel cars and car parts, washing machines, waggons, carriages, agricultural implements, buttons, macaroni, crackers and brooms. The value of the total factory product for 1905 was $13,695,978, an increase of 38.7% over that of 1900.
The value of its factory products in 1905 was $ 1 7, 1 4 6, 33 8 (1 4.3% more than in 1900), the more important being those of steel works and rolling mills ($4,528,907), blast furnaces, steam railway repair shops, cigar and cigarette factories ($1,258,498), foundries and machine shops ($953,617), boot and shoe factories ($922,568), flouring and grist mills, slaughtering and meat-packing establishments and silk mills.
At the general census of 1901 the number of flouring and grist mill establishments, each employing five persons and over, was returned at 400, the number of employes being 4251 and the value of products $31,835,873.
Of the other products, iron and steel ($6,108,295), flouring and grist-mill products ($4,528,062), foundry and machine-shop products ($3,986,985), steam railway repair and construction work ($3,141,602), printing and publishing, wholesale slaughtering and meat packing, malt liquors, lumber and timber, and coke were the most important.
Leavenworth is a trading centre and has various manufactures, the most important being foundry and machine shop and flouring and grist-mill products, and furniture.