220 
SELECTED ARTICLES. 
duct by steam, stronger than the second by naked fire; this 
might have depended on a difference in the state of division 
of the root but at the same time I am convinced that distilla- 
tion by a naked fire gives the best result. 
Roses, 1:1. The product by steam was infinite^ supe- 
rior to that by the other mode. 
Sage, 1 : 2. This gave a less quantity of essence by naked 
fire, and although the two products were very similar, that by 
steam was the best. 
Elder flowers, 1 : 1. Preference is usually given to the pro- 
duct from the dried flowers; but on a comparison between 
this and the distilled water from the fresh plant, there appears 
no reason for it, except custom. 
Tansy, 1 : 2. The odour of the tansy is so powerful, that 
it was impossible to discover any difference between the pro- 
ducts of the two processes. 
Thyme, 1 : 2. The product by steam was the best. 
Linden, 1:1. The water prepared from fresh, flowers 
was the most odorous. 
Valerian, 1 : 4. Valerian distilled by steam afforded an 
excellent product; this root like all other dry and hard sub- 
stances should be broken small, moistened with half its weight 
of cold water, and not distilled for twelve hours afterwards. 
On comparing the results obtained, it will be found that 
distillation by steam is preferable in a majority of cases, as 
with 
Wormwood 
Ground ivy 
Aniseed 
Melilot 
Mugwort 
Balm 
Elecampane 
Orange flowers 
Blue bottle 
Roses 
Borage 
Sage 
Honeysuckle 
Elder flowers 
Holy thistle 
Tansey 
Fennel seed 
Thyme 
Juniper 
Linden flowers 
Hyssop 
Valerian 
La vender 
