Disebut tapal kuda karena pada tipe ini, bibir luar nampak melengkung dan menutup ke arah bawah sehingga menyerupai sepatu kuda.Jack McLean, summarising Nader Saiedi's analysis, writes that "the Báb's writings even foresee latest world issues of crisis, including the security on the environment as well as the commodification of purely natural asse