Essential oil which is then collected in the receiving vessel. Most oils are distilled in a single process. One exception is "ylang-ylang" ("Cananga odorata") which is purifed through a fractional distillation. The recondensed water is referred to as a hydrosol, hydrolat, herbal distillate, or plant water essence, which may be sold as another fragrant product. Hydrosols include rose water, lavender water, lemon balm, clary sage, and orange blossom water. The use of herbal distillates in cosmetics is increasing. Most citrus peel oils are expressed mechanically or cold-pressed (similar to olive oil extraction). Due to the relatively large quantities of oil in citrus
Attar of Nishapur the natural sciences. According to Edward G. Browne, Attar as well as Rumi and Sana'i, were Sunni as evident from the fact that their poetry abounds with praise for the first two caliphs Abu Bakr and Umar ibn al-Khattāb - who are detested by Shia mysticism. According to Annemarie Schimmel, the tendency among Shia authors to include leading mystical poets such as Rumi and Attar among their own ranks, became stronger after the introduction of Twelver Shia as the state religion in the Safavid Empire in 1501. In the introductions of "Mukhtār-Nāma" () and "Khusraw-Nāma" (), Attar lists the titles