{'fraction_non_alphanumeric': 0.033515731874145006, 'fraction_numerical': 0.02188782489740082, 'mean_word_length': 4.5, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
II. Selective Reflection and Optical Rotatory Dispersion

Recently, we have reported [1] that the blue colour of the so-called "blue phase" (BP) of some cholesteryl esters originates from a selective reflection of circularly polarized light (SR) as described for the plane texture of cholesteric phases [2]. Additionally, within the wavelength region of SR an anomalous dispersion of optical rotatory power (ORD) has been found in the BP state [1]. According to the deVries theory of optical properties of cholesterics [2], the SR as well as the ORD results indicate that the BP state implies in some way a helical arrangement of the mesogenic molecules. As described in Part I [3] the existence of two polymorphic BP states has been derived from calorimetric measurements. The aim of this paper is to investigate if the two different phases BP I and BP II give rise to different SR and ORD spectra. The SR spectra were measured in a Cary 17 1 spectrophotometer with a Mettler FP 5 heating stage; the ORD spectra were scanned in a Jasco J 20 spectropolarimeter between quartz plates, sample thickness 25 or 12 [i.m, respectively. As an example, we describe the results obtained in the case of cholesteryl nonanoate (CN): On cooling the isotropic liquid state of CN, at 91.50 °C a sharp SR band occurs at An = 404nm, which is shifted to 407 nm on further cooling down to 91.35 °C. At this temperature additionally a second SR band was observed at Ai = 461 nm (cf.