224 W.J. Knowlton on a new mineral from Rockport, Mass. 
has been boiled with acid and supersaturated with ammonia, 
and the liquid to be tested for hyposulphite added, the mixed 
solution should have so little ruthenium in it as to exhibit only 
a very pale transparent olive coloration—should in fact be almost _ 
without color. Otherwise if the hyposulphite is present In 
mere traces, we get a salmon or flame color instead of the pure 
carmine. 
Arr. XXIV.—Contributions to Chemistry from the Laboratory of 
the Lawrence Scientific School. No. 4.—On a new mineral from 
kport, Mass.; by W. J. KNowuron. 
In the March number of this Journal for the present year, 
Prof. J. P. Cooke has described as malacone a mineral discovere 
by myself at Rockport, Mass., where it occurs in the granite 1 
veins of massive quartz and feldspar. Prof. Cooke's analysis was 
made, as he states, upon a small quantity of material and he 
speaks of it as “imperfect”; he found 
iia oo": MeL gomiiae (raoee gine 
Zirconia, . - = : - - - 66°93 
Sesquioxyd of iron, with trace of manganese, - 2°57 
ater, - - S 2 * e <~-28 
99°59 
which results, if correct, would unquestionably identify the min- 
eral with malacone. I have repeatedly analyzed this mineral, 
and my results differ, as will be seen, so much from those of 
the water. 
ture exhibits a dull brownish-red color. In three determinations 
Before blowpi : ens sa bub 
. : ig ee ite glows brilliantly, and is 
slightly altered in color, ~ caidas dissolves oa easily 2 
