of Edinburgh, Session 1870-71. 483 
indies whose area = 10,609, we think we have advanced in the 
right direction and shown that the builder here places for our 
instruction and guidance another practical illustration of tie 
importance and use of 7 r, its former application being lineal, and 
this superficial. And here we stay to point out bow these curious 
proportions, coincidences, and symbols become legible when read 
by the units of length and volume supplied by the architect of the 
pyramid 'himself, and extant (let us hope) to this day in the very 
spot where their use first becomes imperative. 
For though the proportions remain the same whether expressed 
in inches, feet, or metres, they only become vocal as it were when 
read by the units there prepared and hung up near them. 
What should be the next step in the process of inductive 
argument ? 
The sides and perimeter of this square (of 103'0 P.I.) are so 
obviously connected with the length and breadth of the King’s 
Chamber, as exactly J, and J thereof, that a consideration of the 
area of its floor would perhaps be the next step, guided too by the 
admonition we fancy we have received on passing through the 
antechamber, that cubical and not simply linear or superficial 
measures should occupy us in the chamber ultimately attained. 
With what results this has been done over the area of that floor, 
we already know, from Taylor, Smyth, Petrie, and Day, results too 
so overwhelmingly important, that though the tables of the Law, 
written by the hand of the Omniscient, have been lost to man, we 
have here inscribed by the great architect of the pyramid the very 
essence of all legislation, so exact and so scientific in all its 
branches, as far as we can penetrate, that it is indeed ‘‘ennobling 
to the mind of man to contemplate.” 
2. Experiments and Observations on Binocular Vision. 
By Edward Sang, Esq. 
(. Abstract .) 
This communication was chiefly directed to the question whether 
the idea of distance be obtained from the adjustment of the eyes 
to distinct vision, or from the convergence of their axes. The case 
of the chameleon was cited as one in point, since that lizard 
