Coal From Tonquin

San Francisco. Sept. 1.- China has thrown down the gauntlet to the big coal miners of the United States. The American bark Colorado, which has just arrived in port, brought a mixed sample cargo of anthracite and manuíactured red coal, mined and made in the Tonquin district. It was consigned to a coal dealing: flrm of this city, which proraises to push the Chinese f uel on the ooast market at prices greatly below those that Pennslyvania and Weich coals of the same character are now bringing. Examining experts have pronounced the Tonquin coal beds almost inexhaustible. The Chinese article is in the market to stay, it is said, at least as long as the present tariff conditions exist. Tonquin, since the Tonquin war, has been under the control of the Frenen, and it is Frenen capital that is now developing the mines, but the land is still populated by the Chinese as before, and it is the cheap Chinese labor that is employed in the mines; henee the extremely low cost of prortuction which enables the French owners of the Tonquin mines to undersell the coal producers of other countries, where labor is better paid. The coal from the Oriënt is said to be of the finest quality, fully equal to the best Pennslyvania or Welch coal.