420 - Scientific Intelligence. 
solutions of the rosolates, with the basic acetates of lead, or with any 
other metallic salt; nor is any carried down by alumina, or any other 
metallic oxyd. Dr. Miller made two combustions of rosolic acid, which 
yielded results that agree with the formula C,,H,,0,. 
uppa, when investigating some of the derivatives of acetic acid, found 
termed quinoline is of sufficient purity for this purpose. © : 
appears to be the best source of chinoline, yielding, when distilled with 
e 
- “Tn order to procure the blue color, one part by weight of. chinoline is 
to be boiled for ten minutes with one part and a half of iodid of amy’ 
reaction is to be boiled for ten minutes with about six parts of ose 
and, when dissolved, filtered through paper. The filtered liquid is to . 
gently boiled in an enamelled iron pan over a small fire, and 
ammonia gradually added. The ebullition may be prolonged eo ae 
onia, of the 
density of 0°880, and distilled water. The hour having elapsed, 
masses, which dissolve readily in alcohol, yielding a rich purp 
Solution, which may be filtered and kept for use. 
