coeruleum

Praeterea coeruleum montanum, licet ob hilaritatem, elegantiam et imprimis ob aptitudinem sui coloris, [98] quippe qui = b0 [i.e., b12], prae reliquis pigmentis coeruleis eligendum, non a quouis ita tractari potest, vt colore aequabili chartam inducat.

The Creation of Color in Eighteenth-Century Europe 2006

However that may be, in these days both names signify cobalt compounds, coeruleum being a stannate of cobalt, and cyanine a mixture of cobalt and Prussian blue.

Field's Chromatography or Treatise on Colours and Pigments as Used by Artists George Field

This advantage, added to its permanence, has conferred a popularity upon coeruleum which its mere colour would scarcely have gained for it.

Field's Chromatography or Treatise on Colours and Pigments as Used by Artists George Field

Like other blues of cobalt, coeruleum assumes a greenish obscurity in time, but like them it resists for a lengthened period both the action of light and impure air, although chemically it is more open to the influence of the latter, owing to its tin base.

Field's Chromatography or Treatise on Colours and Pigments as Used by Artists George Field

It is in oil, and as a night colour, that coeruleum becomes of service, as our present system of lighting picture galleries by gas affects the purity of blues generally.

Field's Chromatography or Treatise on Colours and Pigments as Used by Artists George Field

It has been common to confound ultramarine with the _cyanus_ and _coeruleum_ of the ancients; but their cyanus, or Armenian blue, was a kind of mineral or mountain blue, tinged with copper; and their coeruleum, although it may sometimes have been real ultramarine, was properly and in general a copper ochre.

Field's Chromatography or Treatise on Colours and Pigments as Used by Artists George Field

Lapides albi et discolores ad coeruleum vergente specie.

Donatello, by Lord Balcarres David Lindsay Crawford 1905

Other dwarfs are recorded to have sprung from species in the same sudden and unexpected manner, as for instance _Ageratum coeruleum_ of the same nursery, further _Clematis Viticella nana_ and _Acer campestre nanum_.

Species and Varieties, Their Origin by Mutation Hugo de Vries 1891

_Polemonium coeruleum_, the _Veronica longifolia_, the gloxinias and others.

Species and Varieties, Their Origin by Mutation Hugo de Vries 1891

_Polemonium coeruleum_ album in the neighborhood of the blue-flowered species, the distance [202] in this case being only 40 meters.

Species and Varieties, Their Origin by Mutation Hugo de Vries 1891