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Licence: In copyright
Credit: "Diffraction by helical structures". Source: Wellcome Collection.
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![BIRKBECK COLLEGE CRYSTALLOGRAPHY LABORATORY (UNIVERSITY OF LONDON) 21 TORRINGTON SQUARE, W.C. 1 museum 0367/8 PROFESSOR J. D. BERNAL, M.A., F.R.S. - AÔ 0^ /pjipt $hu\\û -ptkÁ „ a^- $$% U¡?¿^ — 3 /&Á XhUUUW^o •Itífcr </ WI&*$Xa&ko . 5 XL$SK//Awß, j a Jjífis J6n%t J^w^ WAT y Xfa Ü¿ÁjXm (pfrlo <X4A£f.sC~'' OÙ ÁqJ^: O^Ô * aÄ: ymJ^dr^Aß. vt ^(jJt Asktfr - - : S (X pv\j ÁjzhahX . hJ-wj^- OKml cr¿ <XK -&^¡f iicf jí: ^ (hjJC ¿Je- JLÁA /qjhw^' h^Ás£j^< y $ jutu\íí^ ¿Á¿ /(áa^Q Í¡¿áT ^ <W tkJ£ «tefäP**? <+■ *&[ S<JUNJ. fatitu. Z^kL ■& oX$u--a soh&M V <5&w- (] $X ) ^M A](https://iiif.wellcomecollection.org/image/b18166714_PP_CRI_H_2_17_0001.jp2/full/800%2C/0/default.jpg)