If silica be present, it gives the iron bead when heated with a little ferric oxide; if tin is present there is no change.
The bead is illuminated and shows a bright point of light.
I did not make the knot large enough in the next string, and the beads came off as fast as she put them on; but she solved the difficulty herself by putting the string through a bead and tying it.
When I next saw her she was a formless heap of cotton, which I should not have recognized at all except for the two bead eyes which looked out at me reproachfully.
Gold and copper salts give a metallic bead without an incrustation.
Heat the substance with a bead of microcosmic salt or borax on a platinum wire in the oxidizing flame.
They may be recognized by the brownish violet colour they impart to a borax bead when heated in an oxidizing flame.
Titanium oxide when fused with microcosmic salt in the oxidizing flame yields a bead which is yellowish in the heat but colourless after cooling.
If the hot bead is colourless and remains clear on cooling, we may suspect the presence of antimony, aluminium, zinc, cadmium, lead, calcium and magnesium.
On the seat opposite me sat my big rag doll, Nancy, in a new gingham dress and a beruffled sunbonnet, looking at me out of two bead eyes.