Brush and Dana — Mineral Locality at Branohville. 209 

 observed angles of DesCloizeaax make it for the axial ratio 



here taken .Ml. A.8 will be Been below the angles of a num- 

 ber of forms on the Branchville hnreanlite agree pretty well 

 with the angles measured by DesCloizeaux, with the single 



exception of the prism. For this he found 119°, while we 

 make it. for the Branchville crystals 124° 42'. [t is this dis- 

 crepancy which causes the want of agreement which we have 

 just alluded to. Furthermore, it is seen that the complex 

 ibols o\' several of the planes, in DesCloizeaux's position 

 and referred to his axes, become simplified when referred to 

 the axes here adopted. __()f the planes noted by DesCloizeaux on 

 type 2, all but one (II"9*10) it will be seen, occurs on the 

 Branchville crystals and to this the symbol r>32 probably be- 

 longs in our position. Of the forms of the lirst type, only the 

 prism occurs with us, but to the other planes the probable 

 symbols in our position may be assigned. 



DesCloizeaux. 





DesCloizeaux. 







001 p 



103 



311 



u 



[2-32? 



Oil c ! 



153 



341 



t 



661? 



The following table gives the more important angles calcu- 





Calculated. 



—Branchville 



Measured 



( 62" 18', 62 



° 25' 



) 



ioo - no 



*62° 21' 



\ 62 27 62 

 ( 62 45 



35 



1 



O01 - 100 



*84 1 



83 26 







100 



95 59 



96 9 







" .03 



5 13* 









•' 401 



50 49 









100-401 



45 10 



45 54 







100 a 223 



74 47^ 









111 



71 25 



71 9 







100- 841 



47 59 









'' A 511 



41 40 



(42 12,42 

 ( 42 35 



14, 



\ 



O01 - 223 



21 3 



21 3, 21 



58 





•• -111 



29 46 



29 40, 29 



28 





•' - 110 



87 14 



j 87°, 87° 

 I 87 12' 



4', 



\ 



" -221 



51 17 









•' A Oil 



59 30 









" a110 



92 46 



92° 56' 







223 * 223 



37 9 



37 37 







111-1 1 



52 14* 



51 54 







511 a 511 



35 58 



36 7, 36 



31 





110- 111 



57 28 



j 57 32, 57 

 ( 57 42 



22, 



\ 



223 



66 s 11' 



66 12, 67 



3 





no 221 



41 29 



42 1 







•• A 511 



51 c 9' 



j 51 40. 51 

 / 51 52 



50, 



\ 



k - - 341 



25 ; 13' 



25 13, 25° 



22' 





41 a 401 



*70 54' 



70 53, 71° 



19' 





, DesCloiz 



Calculated. 



eaux. , 



Measured. 



59° 





59 c 



» 



83 



29' 



83° 



39' 



96 



31 



96 



30 



50 



42 



(5 

 50 



58) 

 50 



45 



49 



45 



40 



42 10 



30 



40 



29 



25 



86 



42 



86 





50 



17 



50 



29 







59 



30 



52 



13 



51 





38 



33 



37 





56 



2 



55 



45 



43 



2 



43 





4£ 



57 



49 





