AMERICAN 
JOURNAL OF SCIEN CH AND ARTS. 
[SECOND SERIES.] 
Arr. XI—On some phenomena of Binocular Vision; by 
JOSEPH LeConrtz, Prof. Chem. and Geol. in University of 
South Carolina. ., 
“ [Continued from page 77] 
steat service to me, and have made my results much more 
cation for other eyes is very great, Many of these riments 
— I find perfectly easy are almost impossible for most 
ons, 
Helmholtz’s lecture, I suppose, is the most authoritative 
““Inent which we have of the present condition of science on 
* Proce, Roy. Soc., April, 1864, vol. xiii, p. 186. 
_ AW Jour. Scz.—Szcoxp Senies, Vor. XLVIL, No. 140.—Mancu, 1869. 
on 11 
