If the diffraction pattern from crystalline proteins is recorded with shorter wavelengths than is customary the radiation damage may be reduced and absorption corrections become less important.

231calculated using the experimentally determined elastic constants and are shown in Fig. 5 where the dotted curves are corrected for second-order diffuse reflexion and the solid curves are without this correction. The variation of second-order correction with direction can be seen from Fig. 5.

A fully automatic single-crystal X-ray diffractometer is described, which uses a mechanical analogue of the reciprocal lattice for setting crystal and counter. Its use and performance are discussed.

No abstract

No abstract