DISTRIBUTION OF ALLANITE 471 



above 1.78, and the difference between the greatest and least indices to 

 be 0.032/'2« 



Bastin^^ mentions the occurrence of allanite in the pegmatite at Crown 

 Point, but the mineral is probably very sparsely distributed. Allanite is 

 also found in the pegmatite at Edenville/^ near Warwick, and as tabular 

 crystals at West Point/^ in Orange County, and in pegmatite at Ellen- 

 ville,*^ Ulster County. The allanite from the Ulster County locality 

 exhibits some exterior alteration from weathering. 



Although found in many localities in New York vState, the only pub- 

 lished analyses of allanite known to the writer are of the mineral from 

 West Point and Monroe, Orange County (analyses III and VII of table 

 on page 474. 



New Jersey. — Tabular crystals of allanite up to 3 inches across and of 

 dull black color are reported to be abundant in the coarse granite of the 

 Trotter mine, Franklin furnace, and in the same rock in various iron 

 (magnetite) mines.*^ According to Kemp,*^ allanite is very abundant 

 in the granite dike that pierces the ore body of the Trotter mine, and in 

 pegmatite masses in the abandoned iron mines on the hill north of the 

 depot. It also occurs with pyroxene in the Mud mine at Ogdensburg, 

 where the granitic or dioritic intrusions are well developed. Palache*^ 

 mentions the following minerals associated with allanite in the magnetite 

 near Franklin furnace: Arsenopyrite, phlogopite, rutile, scapolite, iron 

 spinel, and zircon. Some of these he says are directly traceable to the 

 granite associated with the ores. Bayley^* remarks that most of the min- 

 erals named are probably in the ore within the limestone. 



Pennsylvania}^^ — Allanite occurrences in Pennsylvania are limited to 

 Northampton, Lehigh, "Berks, Bucks, Montgomery, Chester, Delaware, 



3" Bull. Soc. Min. Trans., vol. xi, 1888, p. 65. 

 3' E. S. Bastin : Bull. 420, U. S. Geol. Survey, 1910, p. 55. 

 3« E. S. Dana : A System of Mineralogy, 1892, p. 525. 

 3» C. Bergemann : Am. Jour. Scl., vol. 13, 1852, p. 416. 



H. P. Whitlock : Bull. 70, N. Y. State Museum, 1903, p. 56. 

 ^ Specimen kindly furnished the writer by Mr. George L. English, Rochester, New 

 York. 



C. Bergemann : Pogg. Ann., Bd. 84, p. 485. 



Genth and Keyser : Am. Jour. Sci., vol. 19, 1855, p. 20. 



Erdm, Jour. Pract. Chem., Bd. 64, p. 471. 



Reakirt : Jour. pr. Chem., Bd. 60, p. 274. 

 *i Franklin Furnace folio. New Jersey, No. 161, 1908, p. 8. 

 ^ J. F. Kemp : N. Y. Acad. Sci., vol. vii, 1892-1894, pp. 638-650. 

 *3 Franklin Furnace folio. New Jersey, No. 161, 1908, pp. 8-10. 



A. S, Eakle : Trans. N. Y. Acad. Sci., vol. xiii, 1894, pp. 102-107 ; Am. Jour. Sci., 

 vol. xlvii, 1894, pp. 436-439. 



T. S. Hunt: Am. Jour. Sci., vol. 34, 3 862, p. 204. 

 ** W. S. Bayley : Geol. Survey of New Jersey, vol. vii, 1910, p. 116. 

 *^a The writer makes grateful acknowledgment to Dr. Edgar T. Wherry, U. S. National 

 Museum, for much of the data relating to allanite in Pennsylvania. 



