106 Journal of the Mitchell Society [August 



a pea up to a large rough crystal that weighed almost exact- 

 ly 60 pounds. ISTio attempt was made at this time to deter- 

 mine the percentage of monazite that the rock would carry. 

 One or two pans full of the monazite-bearing portion of the 

 rock were dug out, which gave nearly a pound of monazite. 



As stated above, the monazite is in the form of irregular 

 fragments, rough crystals and cleavable masses. One of the 

 best crystals observed was a part of a mass that weighed 6 1-2 

 pounds, which was made up of crystals in parallel position 

 with some of the facies very perfectly developed. Another 

 crystal, which was well terminated, weighed 12 ounces. It 

 was 2 3-4 inches long in the direction of the h axis and 1 1-2 

 inches in the direction of the a axis and 2 1-4 inches long in the 

 direction of the c axis. The prismatic facies of the a pinacoid 

 were well developed as was also the unit pyramid w. The low- 

 er end of the crystal showed no terminations. The facies ob- 

 served on these crystals were indentified by means of the con- 

 tacit goniomteter and were as follows: a (100); m (Oil); w 

 (101); V (111). 



The basal plane c was not observed on any of the crystals but 

 was observed as one of the parting or cleavage planes. Part- 

 ing planes were also very prominently developed parallel to m. 



The masses of monazite were very pure and one analysis 

 made to determine the percentage of monazite in the masses 

 showed it to contain 99.5 per cent, monazite. ]SJ"o chemical 

 analyses have been made of the mineral beyond the determina- 

 tion of the thoria. This determination, which was made in the 

 laboratory of the Welsbach Light Company, showed this mona- 

 zite to contain 5.06 per cent, thoria, which is equal to the per- 

 centage of thoria in the best commercial monazite found in 

 the South Mountain region. 



The size of the crystals of monazite found in this deposit 

 and the possibility of its developing into an occurrence of 

 commercial value mfake the discovery a most interesting one. 



With any new or increasing demand for Carolina monazite, 

 this property will undoubtedly be further developed with a 

 good prospect of its becoming a commercial source of thoria. 



During the past three years the monazite industry of the 



