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977 Notes and News Announcements and other items of crystallographic interest will be published under this heading at the discretion of the Editorial Board. Copy should be sent direct to the British Co.editor (R. C. Evans, Crystallographic Laboratory, Cavendish Laboratory, Cambridge, England). 3 ° Strips for Fourier A n a l y s i s and S y n t h e s i s A t h i r d issue of these Fourier strips has now been completed, a n d the sets can be supplied in the following two forms: (1) U n c u t tables, each set containing 366 tables 7 in. b y 12½ in., duplicated on b o t h sides (except t h a t the h = 30 tables are printed on one side only). Instructions for c u t t i n g a n d for the m a k i n g of suitable boxes can be supplied. Delivery of this form is prompt. Price £15, plus postage. (2) Cut strips, m o u n t e d in two mah o g a n y boxes w i t h sloping sides, r e a d y for use. Delivery time in this form depends u p o n the demand. The price is £40, plus £2.10.0. cost of crate for export, plus cost of shipping. The gross weight is 45 lb. The 3 ° strips give the values of A cos hn3 ° a n d A sin hn3 ° to the nearest integer, for values of n going from 0 to 30 (even values of n being on one side a n d odd values of n on the reverse side). The range of A covered (on the different strips) is from --100 to + 100 in steps of 1, a n d t h e n to + 9 0 0 in steps of 100. Thus immediate two-figure working is obtained, a n d users requiring higher accuracy can draw two strips per amplitude to reach a value of 1,000. The values of h go directly up to 30 in different c o m p a r t m e n t s of the boxes, b u t the separation into even a n d odd values of n means t h a t b y suitable changes of sign of the amplitudes the range of h can be extended to all values. Similarly, of course, the range of n can be extended from 30 to 120. Papers describing the strips a n d their uses are: BEEVERS, C . A . & L~eso~, H . (1934). Phil. Mag. 855. BEEVERS, C. A. & L~eso~, H. (1936). Nature, Lend. 825. Lreso~, H. & BEEV~RS, C . A . (1936). Prec. Phys. 48, 772. BEEVERS, C . A . (1952). Acta Cryst. 5, 670. BEEVERS, C. A. & LIPSO~, H. (1952). Acta Cryst. 5, 17, 137, Soc. 673. All enquiries should be addressed to Dr C. A. Beevers, D e p a r t m e n t of Chemistry, W e s t Mains Road, E d i n b u r g h 9, Scotland. International U n i o n of Crystallography The E x e c u t i v e Committee acknowledges w i t h deep g r a t i t u d e the receipt of a sum of $ 2853.70, representing the balance of funds raised in the U.S.A. some time ago u n d e r the sponsorship of the N a t i o n a l Research Council in support of the publication programme of the Union. Structure de GeUO4 An error occurs in the aboxie short communication b y A. Durif (Acta Cryst. (1956), 9, 533). The last line of oxygen coordinates should read y, ½+~, ¼+z; y, ½--x, ¼+z. Tables de lin6arisation des produits et p u i s sances des facteurs de structure Errors occur in the above short communication b y E. F . B e r t a u t a n d J. Dulae (Acts Cryst. (1956), 9, 322). I n § 1° (a) (--1) k+l a n d (--1) l+h should read (--1) '¢+l a n d (-- 1)Z+h respectively. I n the reprints of this article e on the right-hand side of equation (1) should read el. A note on cyc/o-(hexap, lycyl) Errors occttr in the above short communication b y E. M. Cant (Acts Cryst. (1956), 9, 681). The b cell dimension of cycle- (hexaglycyl) h e m i h y d r a t e should be 15.59 A. The space group of cyclo-(hexaglycyl) m o n o h y d r a t e should be P2/a. Krisfallogra]iya The following is the list of contents of the first t h r e e p a r t s of t h e recently-founded Russian journal Kristallografiya. Part 1 Articles N. V. BELOV a n d T. N. TA_~KHOVA. Coloured s y m m e t r y groups. A. I. t~T~aGORODSXrr. D e t e r m i n a t i o n of t h e signs of structure amplitudes. B. K. V ~ S H T E I N . The kinetic t h e o r y of the intensities of reflexions in a n electronogram. I. P o i n t electronograms. M. A. PORA~-Kos~rITS. A deduction of the working formulae for the electron density a n d structure a m p l i t u d e s on the basis of t h e s y m m e t r y a n d a n t i - s y m m e t r y properties of trigonometric functions. G. B. Bo~II, T . I . M__~r~ovsxII a n d A. V. ABLOV. The structures of the dihalogeno-diamines of cobalt. E. A. GRIBOVA, G. S. Z~rDA_WOVand G.A. GOL'D~R. X - r a y structural investigations of indigo a n d thioindigo. G. S. ZHDANOV, Z. V. Z v o ~ o v A a n d L. G. VORONTSOVA. X - r a y structural investigation of m e t h y l e n e blue. Z. G. PINSX.ER a n d S. V. KAV~RI~. Electronographie det e r m i n a t i o n of the structure of the iron carbide Fe4C. Z. V. ZvoNxovA. Crystal-chemical studies of the n a t u r e of donor-accepter bonds in complex compounds of boron. G . B . B o ~ t I a n d S. S. BATS~-C~OV. New ionic refractions. A.F. K_~usT~s~. Constant a n d multiple proportions as basic assumptions of c r y s t a l l o g r a p h y a n d chemistry. A. V. S ~ N I K O V . Certain peculiarities of the t h e r m a l deformation of crystals. I. S. ZEELVDEV. Dielectric ellipsoids a n d surfaces of dielectric permeability. G. G. LEM]YlLE1-Na n d E. D. DtYKOVA. I n v e s t i g a t i o n of t h e rates of t a n g e n t i a l growth of e l e m e n t a r y layers on crystals of paratoluidine. A. A. C m ~ N o v . On t a n g e n t i a l rates of growth of elem e n t a r y layers on t h e surface of a crystal. "978 NOTES AND -I. A. YAXOVlmV, L. F. ]V[I~n'E~EV and T. S. VELICHKII~A. Molecular scattering of light a n d the transformation of quartz. S h o r t communication~ N . V. B ~ o v a n d T. N. T ~ O V A . On 'strips' methods of calculating Fourier syntheses in the structure analysis of crystals. B. K. VAII~SZ~TEIN. Application of the theorem of convolution to the deduction of the formula for the t e m p e r a t u r e factor. K . S. AImKSA~DROV. A special case of the propagation of elastic waves ifi crystals. KH. S. BAGDASAROV a n d A. P. KAPUSTII~. Obtaining etch figures b y means of ultrasonic oscillations. S. S. BATSANOV. The relation between the temperatures of melting a n d the refractive indices of ionic crystals. B. F. O ~ o ~ r . On the question of the possibility of forming the structures of deuterides (hydrides) of metals keeping molecules or pairs of h y d r o g e n atoms in the lattice. Articles Part 2 Pierre Curie (On the 50th a n n i v e r s a r y of his death). B. K. V ~ n ~ s ~ n ~ . The kinematic t h e o r y of the intensities of reflections in a n eleetronogram. I I . Electronograms from textures a n d polycrystals. A. I. ZAS~VSXH a n d D. L. ROOACHEV. D e t e r m i n a t i o n of t h e Laue class a n d the orientation of an inorganic crystal from one p h o t o g r a p h of the s t a t i o n a r y crystal in polychromatie radiation. N . L. S ~ N O V A . Structural t y p e s w i t h the closest packLug of atoms. Possible structure types with the composition A B 3. E. G. I~SE~rKO, I. M. RumA~OVA a n d N. V. BET,ov. The crystal structure of zoisite. G. B. BoKix a n d T. S. KHODASHOVA. An X - r a y structural s t u d y of crystals of I n F 3 . 3tt~O. N. N. Z ~ v ~ m v a n d G . S . ZHDANOV. Metallographic a n d X - r a y studies of alloys in the system g e r m a n i u m rhodium. S. A. SE~,ETOV a n d Z. G. PINS~ER. An electronographic s t u d y of the degree of perfection of single crystals of germanium. B. B. ZVYA~n~. The electronographie investigation of h y d r o -micas. G. I. D~S~mR. The optical properties of new ultraviolet polarizing light filters. G. I. DXST~mR a n d E. V. P~a~VOVA. The exploitation and s t u d y of t h e r m a l l y stable polarizing light filters. P. G. POSDNY~KOV. The growth of crystals of ethylene cliamlne t a r t r a t e . Short communications N. V. BELOV a n d T . N . TARKHOVA. A nomographic m e t h o d for calculating structure factors. Z. G. PI~SKER, O. S. OREKHVO a n d A. I. MILT,ER. Electronographie studies of alloys of Bi a n d Sb a n d certain oxides of these elements. I. E. KA~r~rrsEv. The question of the orientated crystallization of potassium iodide a n d bromide on muscovite. ¥ . G. ZUBOV. A simple m e t h o d of observing the phase transformation in single crystals of quartz. NEWS Letters to the editor A. V. SHUB~KOV. On the absence of a determined relationship between the homology of t h e external forms of crystals a n d the homology of their optical indicatrixes. ]:~eview M. A. POR~-KOSHITS. The application of calculating machines in X - r a y structural calculations. Articles Part 3 I n m e m o r y of A. K. Boldyrev. G. S. ZtIDANOV, M. M. UMANSKII, L. A. VARFOLOMEEVA, Z. I. EZHKOVA, Z. K . ZOLINA. X - r a y d e t e r m i n a t i o n of the elementary cells and space groups of the piezoelectric crystals KLiC4H4Oe. H20, N H 4 L i C , H 4 0 e . H 2 0 , N a H C 4 H 4 0 6 . H 2 0 and (NH4)2C,H406. L. N. SYRKIN. I n v e s t i g a t i o n of the form of the potential contours for the ions in crystals of the perovskite type. I. V. YAVORSXH. The geometry of a diffraction picture for dynamic interaction of X - r a y s with the crystal. M. A. POR~-KOSHITS. The crystal structure of caesium tetrachlorocobaltate, Cs2CoC14. Z. G. PINSKER a n d V. I. KHITROVA. S t u d y of the structures of four-component alloys of T1-Sb-As-Se. S. A. SEMILETOV. Electronographic s t u d y of the structures of t h i n layers of the sulphide, selenide a n d telluride of cadmium. B. K. VAINSHTEr~ and M. M. STASOVA. An electronographie s t u d y of cryptohalite. S. S. BATSKNOV a n d A . S . So~-xN. The refractivity of hydrogen bonds in inorganic compounds. I I . S. S. BATSANOV. The refractivity of hydrogen bonds in inorganic compounds. I I I . V. L. BROUDE and A. F. PRIKHOT'KO. The s t u d y of structural changes in crystals from their spectra a t low temperatures. A. I. FROIMAN a n d V. M. FRIDKI~. I n v e s t i g a t i o n of heterocharging of electrets of carnauba wax. G. G. LEMMLEIN and E. D. DUXOVA. The formation of screw dislocations in the growth process of a crystal. P. G. POZDNYAKOV. The growth of crystals of lithium sulphate. Short c o m m u n i c a t i o n s N. V. BELOV a n d T. N. TAaK~OVA. On the group of a 48-hedron. 1~/I. N. LYASHENKO. Crystals of complex compounds of metals of the p l a t i n u m group (13th paper). ]~. E. BUROVAYA. Crystals of complex compounds of metals of the p l a t i n u m group (14th paper). K. N. BARA~SKII, L. A. G~IBOV and V. P. PRIXHOD'XO. The refractive index of Rochel]e salt near to its phase transition point. I. S. ZHELUDEV a n d V. M. M A ~ O V . The m e a s u r e m e n t of pressures in explosions of gas mixtures b y means of a piezo-electrie transducer. K. S. ALEKSA~DROV a n d V. YA. KHAI~ov-M-~T,'KOV. Rot a t i o n of the plane of polarization of torsional elastic waves. A. V. SHUBNIKOV. On peculiarities in the crystallization of diphenylamine.