...interest, but its authenticity has been much disputed. Though the question is surrounded with difficulties, the balance of probability would seem to be in favour of the substantial truth of what the book itself sets forth, that it was written in 893. At any rate, the...

...NX23* = (2,0)3* + (2,1)3*! + * +....where (0,^))= -(1,0) and generally (a,/8) + (j8,o) = 0. This fonn of his own he frankly characterises as " elegant and...equations this would not be at all difficult. For MD 2c example, if we wish to eliminate £C2, xa, xt from the equations CUCj + Ьх3 + CXt = £ —...

...p. 288. ,1)e*! + (0,2)8*2 + . . . . NX28.e = (2, where (0,0)= -(1,0) and generally (o,/3) + (/8,a) = 0. This form of his own he frankly characterises as...all difficult. For example, if we wish to eliminate x2, x2, x4 from the equations ax,, + bxx + cx4 = £ -ax, . + ,1x., + ex, = ( -bxl-ds., . + fxt = f...

...(1,2)3*,+ .... NX23.e = (2,0)^+02,1)?*! + * + . . . . where (0,0)= -(1,0) and generally (o,/J) + (/3,a) = 0. This form of his own he frankly characterises as...all difficult. For example, if we wish to eliminate *2, z3, z4 from the equations ax., + bx3 + ear, = — axl . + flx.j + exi = -bxl-dx!, . + fx4 = the...

...conditions shall continue to change in such a way as to make it worth while for such a thing to occur? The balance of probability would seem to be in favour of the appearance of structural characters by single mutations, and in that case it seems rather absurd to...