476 
DR. JOHN STENHOUSE ON THE OILS PRODUCED BY THE ACTION 
crystals become opake when dried, but when crystallized out of weak spirits, they 
retain their transparency. When dried under the air-purnp and subjected to analysis, 
the salt was found to have the same formula as the corresponding salt of furfurine, 
viz. C 30 N 2 Ofi+NOg-f HO. 
0*488 grm. salt gave 0*972 carbonic acid and 0*1875 water. 
Calculated numbers. Found numbers. 
C 54*30 54*32 
II 3*99 4*26 
When the nitrate of fucusine is heated in the water-bath to 100 ° C,, it soon becomes 
coloured and decomposes. 
Through the kindness of Professor W. H. Miller of Cambridge, which I have often 
formerly experienced, I am enabled to subjoin the annexed figures and measurements 
of the crystals of the nitrates of fucusine and furfurine. 
Nitrate of Fucusine. 
Prismatic : — The symbols of the simple forms are, — a 100, 01 1 , m 1 10, a* 1 1 1 . 
The angles between normals to the faces are, — 
uu' 64 0 
ma 47 51 
mm! 84 18 
sa 68 6 
su 21 54 
ss' 43 48 
ss" 60 42 
.yV' 71 0 
Cleavage : — a, very perfect ; u, s, less perfect. 
Nitrate of Furfurine. 
Prismatic v — The symbols of the simple forms are , — a 100, h 010, e 101, ^ 310, n 320, 
A 1 1 1 : a truncates the edge tt'’. 
The angles between normals to the faces are, — 
ea 70 40 
ee' 38 40 
nb 47 50 
tb 65 40 
ab 90 0 
nn! 84 20 
tf 48 40 
sa 72 8 
ss' 35 44 
sb 67 39 
ss" 44 42 
s's" 58 44 
Cleavage : — very perfect ; a, t, less perfect. 
