The British Encyclopedia, Or Dictionary of Arts and Sciences: Comprising an Accurate and Popular View of the Present Improved State of Human Knowledge : Illustrated with Upwards of 150 Elegant Engravings. N - R. 5Longman, 1809 - 680 pages |
From inside the book
Results 1-5 of 100
Page 11
... glass tube , about a line in diameter , over mercury , and a series of electric shocks be passed through them for some hours , they will form nitric acid ; or , if a solution of potash be present with them , nitrate of potash will be ...
... glass tube , about a line in diameter , over mercury , and a series of electric shocks be passed through them for some hours , they will form nitric acid ; or , if a solution of potash be present with them , nitrate of potash will be ...
Page 16
... glass of a telescope , or microscope , the glass placed at the end of the tube which is next the object . To prove the goodness and regularity of an object - glass , on a paper , describe two concentric circles , the one having its ...
... glass of a telescope , or microscope , the glass placed at the end of the tube which is next the object . To prove the goodness and regularity of an object - glass , on a paper , describe two concentric circles , the one having its ...
Page 17
... glasses , with- out colouring or haziness . A circular ob- ject - glass is said to be truly centered when the centre of its circumference falls ex- actly in the axis of the glass ; and to be ill centered when it falls out of the axis ...
... glasses , with- out colouring or haziness . A circular ob- ject - glass is said to be truly centered when the centre of its circumference falls ex- actly in the axis of the glass ; and to be ill centered when it falls out of the axis ...
Page 22
... glass , whose focal distance is 17 inches , and aperture 2.45 inches , and furnished with six different eye - tubes ; so that its mag- nifying powers extend from 44 to 168. The telescope in this equatorial may be brought parallel to the ...
... glass , whose focal distance is 17 inches , and aperture 2.45 inches , and furnished with six different eye - tubes ; so that its mag- nifying powers extend from 44 to 168. The telescope in this equatorial may be brought parallel to the ...
Page 24
... glass , and that point is your meri- dian mark found by one observation only ; the best time for this operation is three hours before or three hours after twelve at noon . 2. To point the telescope on a star , though not on the meridian ...
... glass , and that point is your meri- dian mark found by one observation only ; the best time for this operation is three hours before or three hours after twelve at noon . 2. To point the telescope on a star , though not on the meridian ...
Other editions - View all
Common terms and phrases
acid action ammonia angle angle of incidence animal appear axis benevolence body botany called calyx centre chyle circle class and order colour common compound connected consequently consists convex convex lens corolla degree distance distilled drupe Dubl earth ecliptic Edin effect employed equal Essential character feelings feet fixed flowers fluid fossil genus glass heat Hence ideas inches instrument iron ject Jussieu kind length less light Lond manner matter means ment metal mind Monogynia class motion mucilage muriatic muriatic acid Natural order nitre nitric acid object observed organs oxide oxygen parabola parallel pass perpendicular person piece plane plants Plate pleasures potash pound principle produced proportion quantity racter rays receiver refraction seeds sensation sensible side solution sometimes species specific gravity stances substances sulphur supposed surface term tincture tion Triandria tube vegetable vessels volatile oils weight