IN USE AT THE ROYAL BOTANIC GARDEN. 217 
One has to distinguish, then, the preservation of the form of 
the parts and the preservation of the lie of the organs of the 
plant. 
II, Methods. 
The following is a convenient grouping of the sarees of — 
preserving here referred to :— 
A. Ln liquid media. 
1. ALCOHOLIC SOLUTIONS. 
a. Alcohol go per cent. 
4. Alcohol, 50 to 80 per cent. 
c. Alcohol and Glycerine. 
@. Synthol. 
2. AQUEOUS SOLUTIONS. 
. Formaline. 
Boric Acid. 
Camphor-water. 
Salicylic Acid. 
Fluorides of Sodium. 
s Va wa 
B. By drying. 
In Air. 
2. In Sand. 
Leal 
. 
[ will deal with each of these separately :-— 
Of the alcoholic solutions, go per cent. alcohol is the one 
generally used, and of the aqueous, formaline. The other 
solutions referred to are some of the Jess-known preservatives 
which have occasionally proved useful. 
‘What we in Edinburgh have been in the habit of calling the “lie” of the 
organs has been termed by Professor Errera, in his report on experiments 
made at the Institute de Botanique, Brussels, ‘‘the attitude” of the speci- 
men. In most of the literature of the subject when a medium is described 
as preserving well the natural form, the shape of the separate organs is only 
referred to, _ 
