Abstract :
MR. HALLIWELI: First of all I should like to congratulate Mr. Jones on his paper, and also the London Section in having a President who has the interest of the Section sufficiently at heart to open the session by reading a paper himself, and a paper to which, he has obviously given a lot of time and thought. He has shown us a very comprehensive range of examples all of which present interesting features, and he is careful to tell us that they have all proved successful in practice, including, I suppose, the gravity clamp shown in Fig. 9. I think in this case he might give us the ratio of loading time to cutting time.
