270 Scientific Intelligence. 
looked upon the Wilsonite as an altered species of some kind, but 
1 thought its affinities lay more with Anorthite (or Latrobite) ‘than 
with Scapolite. lt yet remains to be seen, however, if the Latrobite 
really belongs to the “Asiobehiue: 1 cannot help suspecting its identity 
feldspars and Scapolite, are by no means rare: witness, Waltnstedi’s 
Tunaberg mineral, saan spar, glaucolite, 
elc. 
The aliered condition of the mineral necessarily precludes us from 
drawing any safe dacbaibaes from its composition. few remarks 
may, nevertheless, be ventured upon: but I should first premise that 
the amount of water, oe Ses with that of the intermixed aise 
varies to the extent of p. c. in different specimens. 
term when compared with the generality of altered scapolites; espe- 
_ cially when potash is present as a superadded base. Take, for r in- 
. a stance, the Algerie, the yellow Scapolite from Bolton, ete. This may 
— justify us in considering all the other ingredients as adventitious 
atters, replacing the original lime ; and, in that case, we obtain, with. 
very ile “Dasietele for the Ca, Al, Si, the oxygen ratio 1:2°5:4, as give 
below 
Oxygen. Ratio. 
Silica, - - 47-50 - - 24°66 = < - 4 
Alumina, - - 3117 - - 14:57 - - - 2°5 
Lime, ~=.'- - 21°33 - - 609 - - - 1 
100°00 
This ratio, as you have shewn in your Mineralogy, II, p. 202, is com- 
mon to many sca lites. 
noti renoy in his Traité de Minéralogie, vol. iii, has 
the following okerrnsiond in reference to Amphodelite, with which 
trobite is no ace ‘The specimens of Amphodelite which I 
have had an opportunity to study pare nie de vo Their newt 
ages meeting at an meh of 94° 19’, which he concludes that 1s 
primary is an oblique rhomboidal pris ica Peniea pee 
however, that the cleavage of this iinet ie is, by no means, good ; 
that the angle of 94° is not far removed from a right nate so that ps 
two may yet be brought ns (ab el 
Toronto, Canada West, July 13, 1855, 
2 uarlz ; by: M. Descoizeau —M. Senarmont has acer 
and right-handed characters of the cryaiellige too ae a gener 
law which has since taken a position of great importance, through the 
labors of MM, Pasteur end Marbach. Still its application to quartz was 
not without some anomalies ; and although these irregularities, through 
