Articles written in Proceedings – Section A
Volume 2 Issue 6 December 1935 pp 621-629
The magnetic anisotropics of the nacre of
Volume 4 Issue 4 October 1936 pp 419-422
The magnetic anisotropy of rhombic sulphur has been determined. The magne-crystallic data are in general agreement with the results of X-ray analysis and support the idea of a puckered ring-shaped molecule consisting of 8 atoms, orientated with the plane parallel to the
Volume 4 Issue 5 November 1936 pp 542-550
The magnetic anisotropy of the shells of
Volume 5 Issue 2 February 1937 pp 166-174
The structure of teakwood has been examined by means of X-rays. It has been found that in the annual ring of the heartwood there is almost perfect micellar orientation with respect to the fibre-axis in the brown compact layer, while in the less compact layers there is a relatively large error of orientation. In fact, as we proceed from the most compact towards the least compact layer in the annual ring, there is progressive dis-orientation of the micelles in the fibre. Extraction of wood with various solvents, and chemical treatment, are found to affect the disposition of the micelles relative to the fibre-axis to a marked extent, and these changes have been studied. It has been confirmed that when wood swells in water there is no change of crystal lattice; the phenomenon is intermicellar. Wood-structure near the region of knots and the structurel differences along tangential and radial directions have also been investigated.
Volume 7 Issue 1 January 1938 pp 38-49
The diamagnetic anisotropy and absolute susceptibilities of wood, lignin and wood cellulose have been determined. It has been found that the ‘crystalline’ element in wood is definitely cellulose and that lignin and the hemi-celluloses make no contribution to the magnetic anisotropy, suggesting either a random orientation if they are crystalline or an amorphous structure. In the light of evidence from other sources, it seems most likely that they are amorphous. The anisotropy measurements also indicate that the direction of maximum diamagnetic susceptibility in the cellulose molecule is along the length of the chain. Since it is also known that the direction of maximum electric polarisability too is along the chain length, we find that these directions coincide in the molecule just as in the case of the higher long-chain saturated hydrocarbons.
Volume 8 Issue 1 July 1938 pp 39-60
Volume 11 Issue 5 May 1940 pp 379-388
Volume 11 Issue 5 May 1940 pp 389-397
Volume 11 Issue 5 May 1940 pp 398-408
Volume 12 Issue 2 August 1940 pp 141-156
Volume 14 Issue 4 October 1941 pp 356-376
Volume 14 Issue 4 October 1941 pp 450-458
Volume 22 Issue 2 August 1945 pp 67-74
An expression for diffuser efficiency in compressible flow has been developed. Experimental procedures for the determination of the efficiency are outlined and the steps for calculating it from the experimental data are indicated.
Volume 22 Issue 5 November 1945 pp 1- Erratum
Volume 23 Issue 4 April 1946 pp 174-178
The theory of the electrical circuit of an Airplane C.G. Position Indicator has been developed. The practical application of the circuit to the case of a typical airplane has been demonstrated with the help of a numerical example.