1. Nathaniel Begshaw Ward On the Growth of Plants in Closely Glazed Cases London: John Van Voorst 1842 S. 25.
2. Ward On the Growth(wie Anm. 1) vgl. insbesondere Kapitel 3 On the Imitation of the Natural Conditions of Plants in closely‐glazed Cases. Vgl. auch derselbe Letter from N.B. Ward to Dr. Hooker on the subject of his improved method of transporting living plants Companion to the Botanical Magazine1 (1835) 317–320. Ab den 1850er Jahren findet Ward für seine Erfindung im historiographischen Teil zahlreicher Aquarienschriften Erwähnung.
3. Ward: “In watching the bottle from day to day I observed that the moisture which during the heat of the day arose from the mould condensed on the internal surface of the glass and returned from whence it came thus keeping the mould always equally moist. […︁] [O]wing to the prevention of the escape of the moisture contained within the cases plants will grow for many months and even for years without requiring fresh supplies of water.” Nathaniel Bagshaw Ward A letter from Mr. N.B. Ward to Sir W.J. Hooker on the growth of plants without open exposure to air Companion to the Botanical magazine(May 1836) S. 340.
4. Ward On the Growth(wie Anm. 1) S. 70.
5. Ward On the Growth(wie Anm. 1) S. 42.