T H E J O U R N A L OF I N D U S T R I A L A N D E N G I N E E R I N G C H E M I S T R Y .
948
Dec., 1911
figures for 1909. The deposits which have been exploited are in Arizona, New Mexico, Colorado, Illinois, Kentucky, Tennessee, and New Hampshire. Illinois is much the heaviest producer. There was also imported in 1910,according t o Mr. Burchard, 42,488 short tons, valued a t $135,152. Mr. Burchard's report contains, in addition t o the statistics of the industry, a discussion of the methods of mining and milling fluorspar, as well as a description of recently discovered high-grade deposits in New Mexico.
cubic yard, and in the storage pile for the locks on the Pacific side, $0.8443 per cubic yard. Cement for the large part is delivered in barrels t o the Atlantic division a t a cost of $1.19 a t tidewater in the United States, while in the Pacific division i t is delivered in bags a t a cost of $1.60 a t tidewater in the United States per barrel, less credit for return of bags. As approximately go per cent. of the bags were returned and accepted, the cement in bags cost $1.01 per barrel a t tidewater in the United States.
THE DEVELOPMENT OF THE EXPORT OF AIR SALTPETER FROM NORWAY.
INVESTIGATION OF POTASH DEPOSITS.
The export of this article shows yearly a large increase, although the tptal quantities are not yet very large. According t o the review given out by the ." Bureau Central de Statistique de Kristiania " the figures in 1000 tons of Norgesaltpetar in the years 1go8-1gro are as follows: Country to which exported.
1908.
. . . . . . . . . . . . . . . . . . . 20.5 ................ 538 Germany.. ................ 3841 Sweden Denmark..
..................
1270 Holland. 32 B e l g i u m . . ................ 619 Great Britain. 671 France.. 55.6 Spain.. .. Itsly .. Ireland.. . . . . . . . . . . . . . . . . . .. Russia.. . . . . . . . . . . . . . . . . . . 5 Africa.
