THE PHYSIOLOGY OF VISION. 
131 
THE PEOGEESS OF SANITAEY SCIENCE. 
ABSTRACT OF PAPER BY MR. GEO. JACKSON, F.B.C.S. 
(Read March 8th, 1877.) 
The object of the paper was an argument whether sanitary science 
had advanced, or rather — had its results yet become appreciable? 
Was it not the want of sanitary knowledge amongst the public 
generally, rather than the unadvanced state of the science, which 
prevented the good which would result from its application being 
more appreciable 1 The lecturer then suggested remedies, suggest- 
ing that means should be taken to diffuse a knowledge of the laws 
of physiology, and their bearings on the preservation of health ; a 
better organization for the sanitary administration of the country ; 
a more compulsory enforcement of the laws for the prevention of 
the pollution of the air and water, and for the providing of better 
dwellings for the poor; more definite precautions to be taken to 
prevent the spread of contagious disorders. 
A PLEA FOE THE CEEDULOUS. 
ABSTRACT OF PAPER BY REV. J. M. HOBGE, B.A. 
(Read March 15th, 1877.) 
Object of the lecture : Definition of "the credulous" who were 
pleaded for ; modern necromancy ; apparitions, omens, and dreams ; 
traditional subjects of credulity ; credulity in the abstract. 
THE PHYSIOLOGY OF VISION. 
BY MR. W. SQUARE, F.R.C.S., F.R.G.S. 
(Read March 22nd, 1877.) 
The lecturer described the anatomy of the retina, showing that 
such complicated functions as were exercised in seeing required a 
very complex organ to produce them. In the small space occupied 
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