118 ELECTRICAL THEORY OF ADBORPTTON The writer considers the double layer as consisting of a swface of rigidly fixed atoms under continuous bombardment of positively and negatively charged ions, any particular point on the rigid surface becoming in turn negative, neutral and positive, these conditions arisdg in any order. The observed contact difference is the average effect of these conditions. Where several kinds of atoms are present in the solution the average number of any one of them at the surface will depend on their concentbration, valency and mobility. The variation of contact Werence from negative to neutral and positive was observed with cotton and aluminium sulphate near the neutral point. These variations occurred during the same experiment, the readings being direct measurements of E.1I.F.s developed by filtration under pressure.This point would be covered by putting n2 = 1 and = 2 or 3 in Mukherjee’s equation No. 13.118 ELECTRICAL THEORY OF ADBORPTTON The writer considers the double layer as consisting of a swface of rigidly fixed atoms under continuous bombardment of positively and negatively charged ions, any particular point on the rigid surface becoming in turn negative, neutral and positive, these conditions arisdg in any order. The observed contact difference is the average effect of these conditions. Where several kinds of atoms are present in the solution the average number of any one of them at the surface will depend on their concentbration, valency and mobility. The variation of contact Werence from negative to neutral and positive was observed with cotton and aluminium sulphate near the neutral point.These variations occurred during the same experiment, the readings being direct measurements of E.1I.F.s developed by filtration under pressure. This point would be covered by putting n2 = 1 and = 2 or 3 in Mukherjee’s equation No. 13. 226 PROBLEMS RELATING TO TEXTILE FIBRES THE STRUCTURE OF LINEN CLOTH FOUND IN THE TOMB OF TUT-ANKH-AMEN. BY ALEXANDER SCOTT, F.R.S. The Chairman said that before proceeding with the reading of the papers he would like to interpolate at this stage an exhibition of some slides by Dr. Alexander Scott, F. R. S., which would illustrate the linen used in the shroud of Tut-ankh-amen. Dr. Alexander Scott said that he had been invited by the President to exhibit some photographs of three specimens of linen cloths which were found in the tomb of King Tut-ankh-amen.This king died about I 350 B.c., therefore these specimens are almost 3300 years old. As they vary very notably in their state of preservation, colour and texture, it was thought that they might prove of interest to manufacturers of textiles at the present day. The photographs which were shown upon the screen were taken both by reflected and transmitted light so as to demonstrate the structure of each. The pictures here reproduced are all by reflected light (after bleaching when necessary) and are magnified fifteen times. From this the number of threads in each direction can easily be counted for each specimen. A represents the pall which was within the outermost shrine but covered the second shrine.I t is much coarser in texture than the other two and although very frail could be handled with care. I t was of a strong brown colour. (Fig. I..) B shows the structure of the cloth in which was wrapped a number of ceremonial staves found between the outer and the second shrines. I t was of a very dark brown colour and required handling with the utmost care, a great part having already gone to a fine powder. The feature here is the closeness of the texture and two threads going one way but only one the other. C was from the veil of filmy cloth which was thrown over the two pro- tecting goddesses who stood on guard at the entrance to the sepulchral chamber. I t was of a light brown, almost cream, colour and was comparatively strong notwithstanding its thinness and looseness of weaving.(Fig. 3.) (Fig. 2.)226 PROBLEMS RELATING TO TEXTILE FIBRES THE STRUCTURE OF LINEN CLOTH FOUND IN THE TOMB OF TUT-ANKH-AMEN. BY ALEXANDER SCOTT, F.R.S. The Chairman said that before proceeding with the reading of the papers he would like to interpolate at this stage an exhibition of some slides by Dr. Alexander Scott, F. R. S., which would illustrate the linen used in the shroud of Tut-ankh-amen. Dr. Alexander Scott said that he had been invited by the President to exhibit some photographs of three specimens of linen cloths which were found in the tomb of King Tut-ankh-amen. This king died about I 350 B.c., therefore these specimens are almost 3300 years old.As they vary very notably in their state of preservation, colour and texture, it was thought that they might prove of interest to manufacturers of textiles at the present day. The photographs which were shown upon the screen were taken both by reflected and transmitted light so as to demonstrate the structure of each. The pictures here reproduced are all by reflected light (after bleaching when necessary) and are magnified fifteen times. From this the number of threads in each direction can easily be counted for each specimen. A represents the pall which was within the outermost shrine but covered the second shrine. I t is much coarser in texture than the other two and although very frail could be handled with care. I t was of a strong brown colour. (Fig. I..) B shows the structure of the cloth in which was wrapped a number of ceremonial staves found between the outer and the second shrines. I t was of a very dark brown colour and required handling with the utmost care, a great part having already gone to a fine powder. The feature here is the closeness of the texture and two threads going one way but only one the other. C was from the veil of filmy cloth which was thrown over the two pro- tecting goddesses who stood on guard at the entrance to the sepulchral chamber. I t was of a light brown, almost cream, colour and was comparatively strong notwithstanding its thinness and looseness of weaving. (Fig. 3.) (Fig. 2.)