The British Encyclopedia: Or, Dictionary of Arts and Sciences. Comprising an Accurate and Popular View of the Present Improved State of Human Knowledge, Volume 9Mitchell, Ames, and White, 1818 - Natural history |
From inside the book
Results 1-3 of 30
Page
... ray . The rays diverge from any radiant point , as from a principal focus ; therefore , if a candle be placed at f . in the focus of the convex glass FG , the diverging rays in the space Ff G will be so refracted by the glass , that ...
... ray . The rays diverge from any radiant point , as from a principal focus ; therefore , if a candle be placed at f . in the focus of the convex glass FG , the diverging rays in the space Ff G will be so refracted by the glass , that ...
Page
... rays is not in the centre of the mirror's concavity , but half way between the mir ror and that centre . The rays which pro- ceed from any remote terrestrial object are nearly parallel at the mirror ; not strictly so , but come ...
... rays is not in the centre of the mirror's concavity , but half way between the mir ror and that centre . The rays which pro- ceed from any remote terrestrial object are nearly parallel at the mirror ; not strictly so , but come ...
Page
... rays on the wall after their refrac- tion by the second prism , the red will ap . pear lowest , the violet highest , the rest in the intermediate places in order . Here then the light being very much simpli- fied , and the incidences of ...
... rays on the wall after their refrac- tion by the second prism , the red will ap . pear lowest , the violet highest , the rest in the intermediate places in order . Here then the light being very much simpli- fied , and the incidences of ...
Other editions - View all
The British Encyclopedia: Or, Dictionary of Arts and Sciences. Comprising an ... William Nicholson No preview available - 2015 |
Common terms and phrases
absciss action affections ammonia angle animal antimony appear association axis become benevolence body boiling botany called calyx centre circle class and order colour common compound connected consequence convex lens corolla degree dissolved distance distilled drupe Dubl Edin electuary employed equal Essential character excite feelings fixed flowers fluid fossil frequently genus glass happiness heat Hence ideas inches Jussieu kind less Lond manner means ment metal mind Monogynia class moral motion mucilage muriatic muriatic acid Natural order neral nitre nitric acid object observed Oleum organzine oxide oxygen pains parabola parallax parallel passions pendulum perpendicular person plane Plate pleasures potash principle produced quantity Radix rays refraction respect salt seeds sensation sensible shell shew side sion solution species specific gravity stances substances sulphur supposed syrup term tinc tincture tion ture vapour vessels volatile oils weight