1892.] Light seen as if emanating from Flames. 73 



with the eyelids fixed relatively to the head, the head is moved while 

 the eyeball remains with its axis in the direction of the flame, we 

 see beams of light above the flame when the head is turned upwards, 

 and beams of light below the flame when the head is turned down- 

 wards. Also that if the eyelids are partially closed, as in the diagram, 

 beams will be seen both above and below the flame when the head 

 carrying the eyelids with it, is turned slightly up from the position 

 shown in the diagram. Also that if the eyelids be wide open, instead 

 of half closed as shown in the diagram, no beams, either above or 

 below the flame, will be seen when the two eyelids are equidistant, or 

 nearly equidistant, above and below the middle of the pupil. When 

 the head, with the eyelids, is turned downwards, so as to bring the 

 upper eyelid across the aperture of the pupil, beams of light are seen 

 below the flame ; and when the head, with the eyelids, is turned up- 

 wards so as to bring the lower eyelid across the middle of the pupil, 

 beams of light produced by the prismoid of the lower eyelid are seen 

 above the flame.] 



Notes on Quasi-Ray Seams of Light from Candles, or other small 

 Luminous Spots. 



Date of Note, 29th December, 1891. 



I have noticed decidedly this morning to the following effect : 



In some cases (the nature of which I intend to note further on) I 

 found that, when seeing a small gas flame with apparent descending 

 tail (or quasi-beam of rays), 1 could, by lowering the upper eyelid, 

 cut off vision of the flame, while leaving the tail visible ; and, by still 

 farther lowering the upper eyelid, I could cut off the upper part of 

 the tail, leaving the lower part, the part remote from the flame, quite 

 visible as before. The contrast between lowering the upper eyelid 

 and lowering a screen (a card, for instance) in front of the eye was 

 very remarkable. In the lowering of the card or other screen, the 

 tail vanishes before the flame is eclipsed ; but in lowering the eyelid 

 the flame is eclipsed first. 



In some attitudes I could not bring out these phenomena. I did 

 find them when awake in bed early in the morning, head on pillow 

 and light coming down from a gas flame obliquely to the eye. Point 

 to which eye was directed seemed to do best when taken at an altitude 

 (angular) somewhat above the gas flame. 



Afterwards, this same morning, I found I could see the phenomenon 

 when standing upright and looking at image of gas in mirror. Eay 

 from image ascending obliquely ; eyesight directed above image in 

 looking-glass. 



Again, looking at a gas flame a little above the level of the eye, I 

 stood erect and elevated my face, directing my eyesight to above the 



