There follows discussion of close to 50 pages on headgear, including development of the "Pith Helmet", used by British Troops in the tropics for a century.
ðɛɹ fˈɑːloʊz dɪskˈʌʃən ʌv klˈoʊs tə fˈɪfti pˈeɪdʒᵻz ˌɔn hˈɛdɡɪɹ, ɪŋklˈuːdɪŋ dɪvˈɛləpmənt ʌvðə "pˈɪθ hˈɛlmɪt", jˈuːzd baɪ bɹˈɪɾɪʃ tɹˈuːps ɪnðə tɹˈɑːpɪks fɚɹə sˈɛntʃɚɹi.