32 H. How on Faris delite of Nova Scotia. 
In the course of criticism Dana remarks,* “ —— the ratio of 
oxygen in Heddle’s second analysis is rather 1: 3:44: 24 (that 
of a hydrous nepheline) =RO2Si03+2Al120 081024 BHO (in 
which 2RO=$Na0+14CaO) = silica 40°25, alumina 29°83, lime 
10°84, soda 6:00, water 13:°08=100.” My analyses would agree 
rather better with these pening than with those of Heddle’s 
formula; but still, as Dana ys, “probably the preceding is the 
true ratio for the mineral, ’ and ase the recorded analysest 
_ of nepheline do not give more than two per cent of lime 
Mesolite—The mineral mentioned as the associate of fardelite, 
viz., mesolite, is very much the more abundant of the two, form- 
ing ‘the larger proportion of specimens in which they occur to- 
_ gether, and it is found not only in this association but filling per se 
oid. It would also appear to be ve 
very close texture, having a finely fibrous radiated and ype 
elow. 
when broken up the caekie appeared ae transparent and 
the ‘aggregated crystals were prismatic. 
Dr 
ied at 212° 
Dried ae 4 HSO4. 
