...second spectrum. Light entering the aperture near E strikes against the right-angled prism which we have mentioned as being placed inside the apparatus,...suitable position with reference to the aperture, it spectrum will be obtained, and will be seen ou looking through it. r, shows the position of the...

...second spectrum. Light entering the aperture near E strikes against the right-angled prism which we have mentioned as being placed inside the apparatus,...obtained, and will be seen on looking through it. G is a tube made to fit the microscope to which the instrument is applied. To use this instrument,...

...second spectrum. Light entering the aperture near E strikes against the right-angled prism which we have mentioned as being placed inside the apparatus,...on looking through it. F shows the position of the field lens of the eye-piece. G is a tube made to fit the microscope to which the instrument is applied....

...second spectrum. A light entering the round hole near X strikes against the rightangled prism, which is placed inside the apparatus, and is reflected up through...to the compound prism. If any incandescent object be placed in a suitable position with reference to the round hole, its spectrum will be obtained. F...

...second spectrum. A light entering the round hole near E strikes against the rightangled prism, which is placed inside the apparatus, and is reflected up through the slit belonging to the conjpound prism. If any incandescent object be placed in a suitable position with reference to the...