**Zl**, z2,...zn) yl, y2,.

Yl, y 2,...yn) (**zl**, z2,...zn z1, z 2, ï¿½ï¿½ï¿½zn xi, 'X' 2,...

If the steam at A were dry and saturated, we should have, assuming Regnault's formula (to), H A -H D = 305 (0'-O), whence, if S = .475, we have **zL** = .3 0 5 (0 '- 0)-.

By 7 (5); hence, if ~, u, v be now used to denote the component angular momenta about the co-ordinate axes, we have X=~tm(pyqx)ym(rxpz)**zl**, with two similar formulae, or x= ApHqGr=~, 1

Brilliant pictures of the struggles and passions in the human heart (see NIZAMI), sent forth its first tender shoots in the numerous love stories of the Shahndma, the most fascinating of which is that of **Zl** and Rdabeh, and developed almost into full bloom in Firdousis second great mathnawi Yisiif u Zalik/z, which the aged poet wrote after his flight from Ghazni, and dedicated to the reigning caliph of Bagdad, al Qadir billah.

If the length of the arms AC =BC =/,CD =a,SD=s, the angle of deviation of ° Z the balance from the horizontal =4), the weight of the beam alone G, the weight on one side = P, that on the other = P +Z, and lastly the weight of each scale with its appurtenances = Q then **Zl** tan:473 - 12 (P+Q)+Z la+G sj From this it is inferred that the deviation, and therefore the sensitive - ness, of the balance increases with the length of the beam, and de - creases as the distances, a and s, increase; also, that a heavy balance is, ceteris paribus, less sensitive than a light one, and that the sensitive - ness decreases continually the greater the weight put upon the scales.

Finally, if a is made extremely small, so that practically tan (A = **Zl**/Gs, the sensitiveness is independent of the amount weighed by the balance.