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" ... stripe. So you see that the primary direction of the visual line is completely fixed, and that the eye, which wants only to glance for an instant at a peripheral point of the drawing, and then goes back again to the centre, is not fatigued. This method... "
Proceedings of the Royal Society of London - Page 196
by Royal Society (Great Britain) - 1864
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Proceedings of the Royal Society of London, Volume 13

Royal Society (Great Britain) - 1864 - 636 pages
...direction of the visual line is completely 192 Prof. Helmholtz— Normal Motions of the [April 14, fixed, and that the eye, which wants only to glance...movements the horizontal meridian. Now you need only bring either your own head into an inclined position, or the diagram with the lines, and repeat the...
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The American Journal of Science and Arts

1869 - 488 pages
...any axis at right angles to the optic axis, but does not rotate about the optic axis. Again he states that "vertical and horizontal lines keep their vertical...its primary direction vertically or horizontally." This law had been previously stated by Listing but without proof ; Helmholtz claims to have established...
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Wissenschaftliche Abhandlungen, Volume 3

Hermann von Helmholtz - 1895 - 708 pages
...centre of the coloured stripe. So you see that the primary direction of the visual line is completely fixed, and that the eye, which wants only to glance...movements the horizontal meridian. Now you need only bring either your own head into an inclined position, or the diagram with the lines, and repeat the...
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Wissenschaftliche Abhandlungen, Volume 3

Hermann von Helmholtz - 1895 - 712 pages
...primary direction of the visual üne is completely fixed, and that the eye, which wants only to 192 glance for an instant at a peripheral point of the...with the law which I have enunciated. That is to say, duriiig vertical movements of the eye the vertical meridian plane keeps its vertical position, and...
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The Boston Medical and Surgical Journal, Volume 71

1865 - 750 pages
...centre of the colored stripe. So you see that the primary direction of the visual line is completely fixed, and that the eye, which wants only to glance...movements the horizontal meridian. Now you need only bring cither your own head into an inclined position, or the diagram with the lines, and repeat the...
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The Boston Medical and Surgical Journal, Volume 71

1865 - 552 pages
...stripe. So you sec that the primary direction of the visual line is completely fixed, and that tha eye, which wants only to glance for an instant at...vertical meridian plane keeps its vertical position, aud daring horizontal movements the horizontal meridian. Now you need only bring either your own head...
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Philosophical Magazine

1869 - 1022 pages
...axis at right angles to the optic axis, but does not rotate abuut the optic axis. Again, he states that " vertical and horizontal lines keep their vertical...its primary direction vertically or horizontally." This law had been previously stated by Listing, but without proof; Helmholtz claims to have established...
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The American Journal of Science and Arts, Volumes 97-98

1869 - 946 pages
...any axis at right angles to the optic axis, but does not rotate about the optic axis. Again he states that " vertical and horizontal lines keep their vertical...its primary direction vertically or horizontally." This law had been previously stated by Listing but without proof; Helmholtz claims to have established...
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