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The methods of X-ray analysis have been applied to ice by Ancel St. John and by D. M. Dennison. The former refers the structure to a lattice composed of right triangular prisms of side 4.74 A.U. and height 6.65 A.U.; the latter to a similar lattice of dimensions 4.52 and 7.32 respectively. The actual arrangement of the atoms is not found in either case.
Sir William Bragg (Thu,) studied this question.