Where were ya 10 years ago when I was trying to give my copy away? I paid sixty two quid for it in 1989: read it backwards, forwards, upside down & inside out & still learned nowt; except that I have to tie down a recognised supplier who is prepared to make it work. Even then some excellent manufacturers have fallen by the tubeside with an unfamiliar product. Better leave it to the experts. ■

So why not try one of my equally expensive books. I do not even attempt to give you complicated equations with lots of unknown constants that will not work with any untried product. There are some first approximation methods for a quick check on capability and lots of notes on all the pitfalls.

My Pneumatic Conveying Design Guide - second edition, ISBN 0 7506 5471 6 published in 2004 by Elsevier Butterwoth-Heinemann is entirely in SI units.

My Handbook of Pneumatic Conveying Engineering (with colleagues Jones and Agarwal), ISBN 0 8247 4790 9 published in 2004 by Marcel Dekker is entirely in US engineering units. ■

FOR A USED kLINZING , ROY MARCUS, RIZK i BELIEVE LELUNG ETC BOOK

TRY CONTACTING kLINZING HIMSELF IN THE UNIVERSITY OF PITSBUTGH. THERE ARE MANY THINGS IN THAT BOOK BESIDES ECUATIONS. MINE WAS STOLEN IN HYLSA 6 YEARS AGO , IN MY OPPINION IS REQUIRED READING , YOU CAN ALSO TRY E BAY ...

MARCO ■