Collected works > Edinburgh edition, 1894-98 - Works of Robert Louis Stevenson > Volume 28, 1898 - Appendix
(31) Page 11
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INTERMITTENT LIGHT
Another mode of holophotally producing the intermittent
light has been suggested by my father, and is shown in Fig. 5.
It consists of alternate and opposite sectors of dioptric spheri-
cal mirror, MM, and of FresneFs fixed light apparatus, AA.
By the revolution of this composite frame about the burner,
the same immediate alternation of light and darkness is pro-
duced, the first when the front of the fixed panel, and the
second when the back of the mirror, is presented to the eye
of the sailor.
Fiff. 4.
1 1
Another mode of holophotally producing the intermittent
light has been suggested by my father, and is shown in Fig. 5.
It consists of alternate and opposite sectors of dioptric spheri-
cal mirror, MM, and of FresneFs fixed light apparatus, AA.
By the revolution of this composite frame about the burner,
the same immediate alternation of light and darkness is pro-
duced, the first when the front of the fixed panel, and the
second when the back of the mirror, is presented to the eye
of the sailor.
Fiff. 4.
1 1
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Early editions of Robert Louis Stevenson > Collected works > Works of Robert Louis Stevenson > Appendix > (31) Page 11 |
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Permanent URL | https://digital.nls.uk/99383684 |
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Form / genre: |
Written and printed matter > Books |
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Dates / events: |
1898 [Date published] |
Places: |
Europe >
United Kingdom >
Scotland >
Edinburgh >
Edinburgh
(inhabited place) [Place printed] |
Subject / content: |
Essays Anthologies |
Person / organisation: |
Colvin, Sidney, 1845-1927 [Author of introduction, etc.] |
Form / genre: |
Written and printed matter > Books |
---|---|
Dates / events: |
1894-1898 [Date printed] |
Places: |
Europe >
United Kingdom >
Scotland >
Edinburgh >
Edinburgh
(inhabited place) [Place printed] |
Subject / content: |
Collected works |
Person / organisation: |
Chatto & Windus (Firm) [Distributor] Stevenson, Robert Louis, 1850-1894 [Author] T. and A. Constable [Printer] Longmans, Green, and Co. [Publisher] Colvin, Sidney, 1845-1927 [Editor] |
Person / organisation: |
Stevenson, Robert Louis, 1850-1894 [Author] |
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