Powder Technology

Powder

124

@ Elsevier Sequoia

S.A.,

Lausanne -

Technology, 27 (1980) 124 Printed in the Netherlands

Corrigendum

Powder Technology, 26 (1980) 17 - 27, The Influence of Cations on Particle Interactions and Particle Release from Aqueous Bentonite Gels. J_ C. LE BELL and P. STENIUS. Page 18, left hand column, line 41, ___expected structural hydroxyls... should read, exposed structural hydroxyls... Page 20, left hand column, he 31, the specific gravity value should be 2.7 g cmd3 _ Page 25, left hand column, line 48, gel tubes, should read, test tubes_

Apart from the above rr. nor changes there has been an interchange in the order of the tab1e.s. and their correct order and numbering is as follows: TABLE 4 should be TABLE 1 TABLE 5 should be TABLE 2 TABLE 1 should be TABLE 3 TABLE 2 should be TABLE 4 TABLE 3 should be TABLE 5 Tables 6 and 7 remain as printed. Subsequent changes ik the text should also be noted.

Errata

Powder Technology, 26 (1980) 119 - 126, The Influence of Processing Variables on the Wetting Properties of a Hydrophobic Powder. D. T_ HANSFORD, D. J. W. GRANT and J. M. NEWTON

Page

120,

eqn_ (8)

denominator

should

read F. Page 126, under LIST OF SYMBOLS add r radius of capillary (pm). Under REFERENCES, ref. 12 should read pp. 843 - 847.

Powder Technobgy, 26 (1980) 147 - 159, Steady-State and Transient Gas-Solids Flow Characteristics in Vertical Transport Lines. F. W. STAUB

Page 148, eqn. (6), after V,, minus sign. Before eqn. (8) Before

a&d

eqn. (8) - aa

= , delete the

au,

= 0 should read -

aa

= 0

Page 149, left hand column, line 35, sentence should end .._tinuity waves propagate upwards. Page 150, left hand column, just prior to eqn. (12) line should read . ..eqn. (2). Page 157, right hand column, line 8 for VtiT value read (0.16 ft/min). Page 159, under REFERENCES, ref. 8, publisher should read, Wiley, N-Y., 1969. Ref. 10 journal should Eng., 36 No. 4 (1958) (1973) p_ no. is 1.

read, Can. J. Chem. 141. Ref. 11 after