Taking the valences of Cr and Fe, write symbols for two sets of hydrates, and name them.
"An Introduction to Chemical Science"
R.P. Williams
This lace, like any of the varieties now fashionable may be made wide or narrow, or fine or coarse by designs furnished as required by lace-makers in general; and the patterns may also be developed in silk or ribbon needle-point, which is a style of ornamentation appearing extensively as a decoration for scarfs, piano and table covers, mantel valences, etc.
"The Art of Modern Lace Making"
The Butterick Publishing Co.
These belated explanations of the fundamental ideas of German society quite confused and confounded me, though Hellar seemed in no wise surprised at my ignorance, since as a chemist I had originally been supposed to know only of atoms and valences and such like matters.
"City of Endless Night"
Milo Hastings