Group IV.: C, Si, Ge, Zr, Th, tetravalent; Ti, tetravalent and hexavalent; Sn, Pb, divalent and tetravalent; Ce, trivalent and tetravalent.
C, Si, Ti, Zr, Th, Sn; Fe, Ti.
The actual values of u/zr (calculated in another manner by F.
Zr .?; ?.
Inside a cylinder ?1 = - I iR (' x + yi) 2a2 /(a2 +b 2 '), (Io) 92+1 i 2 i = I ZR (x + yi) 2b2 I (a2 +b 2), (21) and for the interspace, the ellipse being fixed, and a l revolving with angular velocity R (1 +11/11= - giRc 2 sh 2 (n-a+ i)(ch 2a+I)/sh 2 (a i -a), (12) 42+1,'21 = *iRc 2 sh 2(na+Ei)(ch 2a-1)/sh 2(a i - a), (13) satisfying the condition that 4/ 1 and ' // 2 are zero over n = a, and over n =a 1 constant values.
Ry[(h - y) 2 ]/h (8) 4' =4G'- zR[(ahy)2+x2] - ZRRh 3 +3h 2 y+h)x 2 -y 2) -3 x2y + y3 ]/ h (9) and over the base y =o, dx/dv= -dx/dy = +Z R(111 2 - 3x 2)/h4 = - 1 R (s h2 -1-x 2).
Rf > a> b> o> a'> -Do; and then so that PT =c/Zir, and the curve AP is the tractrix; and the coefficient of contraction, or breadth of the jet breadth of the orifice - +i' A change of S2 and 0 into nS2 and nO will give the solution for two walls converging symmetrically to the orifice AA 1 at an angle zr/n.
Thus with a' =o, a stream is split symmetrically by a wedge of angle ' zr/n as in Bobyleff's problem; and, by making a = oo, the wedge extends to infinity; then chnS2= u, sh nS2= b n u.
ZIRCONIUM [[[symbol]] Zr, atomic weight 90 6 (0= 16)], a metallic chemical element.
Zirconium hydroxide, Zr(OH) 4, as thus obtained, is quite appreciably soluble in water and easily in mineral acids, with formation of zirconium salts, e.g.
The anhydrous oxide is with difficulty soluble even in hydrofluoric acid; but a mixture of two parts of concentrated sulphuric acid and one of water dissolves it on continued heating as the sulphate, Zr(S04)2.
When heated in a loosely covered crucible with magnesium the nitride Zr 2 N 3 is formed (Wedekind, Zeit.
The sulphate, Zr(S04)2, is a white mass obtained by dissolving the oxide or hydroxide in sulphuric acid, evaporating and heating the mass to nearly a red heat.
Chem., 1904, 42, p. 87) regards it as a dibasic acid, ZrOS04 S04H2, and that the crystalline sulphate is ZrOS04 S04H2.3H20 (not Zr(S04)2.4H20).
4, 5, 6); and, with one exception, have rooted cheek-teeth, the premolar-formula being zr 1 The infra-orbital foramen is also narrower, and the tympanic bulla is cellular.
If P, be the force at (Xr, Yr, Zr), acting,in the direction (1, m, n), the formulae (6) and (~) reduce to X = Z(P).
Of this description are the Anbiyanama, or history of the pre-Mahommedan prophets, by IIasanI Shabistarl Ayani (before the 8th century of the Hegira); Ibn 1-Iusams Khawartzama (1427; 830 A.11.), of the deeds of All; Badhils ~Iamla-i-Jjaidari, which was completed by Najaf (1723; 1135 A.H.), or the life of Mahommed and the first four caliphs; Ka~ims Fara~~inama-i-Fa4ima, the book of joy of Fatima, Mahomets daughter (1737; 1150 A.H.)all four in the epic metre of the Shahnama; and the prose stories of ~Iatim Tai, the famous model of liberality and generosity in preIslamitic times; of Am-Zr ~Iamzah, the uncle of Mahomet; and of the Mu~jizat-i-Ms?sa~wi, or the miraculous deeds of Moses, by MuIn-almiskin (died about 1501; 907 A.I-L).