336 Dr. Reuben on Moving vee within the Retina. 
or acting a 
singular results which these observations seems to 
furnish, then, are the following: 
uasi-vision of moving blood-discs; showing, incident- 
ally, ‘also the plaiied and courses of certain capillaries of the 
retina. 
bb.—Discovery of some change, in which the momentarily illu- 
minated trace of the dise, in some cases, and usually at a little 
ind the advancing dise, gives way to black. 
—Quasi-vision, in different ways, of the cells or granules in 
sisteos portion of the reti ae 
dd.—Discovery, by apparent absence of these, of either a 
entire seat of sacet distinct, ordinary vision (“ yellow spot”); 
else, of the tin of the insensible spot, magnified. The Sitar 
view doubtful 
ee.— Appearance as of numerous, swarming, black points. 
f— Quasi-vision of numerous small bodies, moving close to- 
gether, and apparently steadily, in unlike directions, but so that 
the several streams cover nearly the whole field; as if the con- 
tents of many capillaries, or venous radicles, close together. 
99-—Obscure perception of cer mottled colors, ‘at the same 
time with vision of the moving disc 
hh.— Quasi-vision of place of ‘eth of a considerable propor- 
tion of the discs into the field of view ; suggesting the artery, or 
a large branch o 
— Quasi-vision of single stream, seen only in a brief course 
through the field, and seemingly without impulsive movement 
—the case 
rept ion of nearly circular, or rosette-shaped area, of 
subjective color, corresponding with the seat of most distinct 
Visi 
li. The actual visibility of this subjective (complementary) 
color, within and in mage of the generally diffused presence of 
the opposite color at t 
V. Among principles incidentally discovered or affirmed in 
course of the discussion, appear to be the following: ! 
aaa.—That the traces A the moving blood-dises are not inva- 
ably, no nor Prenpsersssss/ a color the gee pera of that 
the surrounding retina at the time 
a ee 
