BOTANIC MATERIA MEDICA. 243 
like prominence; their surfaces are of a light 
yellow,sometimes smooth, but often corru gated; 
the epidermis is delicate and shining, beneath 
which lie the cells of fragrant oil. The inter- 
nal and white part of the pericarp is adherent 
to the pulp, the latter being subdivided into 10 
or 12 partitions or segments, each containing 
two or more seeds. The average lemon will 
yield 5 fluid drachms of juice, which contains 
from 7 to 9 per cent. of citric acid, also holding 
in suspension mucilage, and a small quantity of 
malic acid. The peel contains resin and vola- 
tile oil, and as found in the stores is in thin bands 
and much contorted; like the orange peel used 
for a flavor more than aremedy. The juice is 
often prescribed with the alkaline carbonates 
for effervescing and cooling remedies in fevers, 
The juice of the lemon soon decomposes, and 
should, therefore, be used fresh The lime 
juice is from the fruit of the citrus Bergamia, 
the fruit of which is pear-shaped and resembles 
the lemon in its color and prolongations. Tne 
attar, known as Cedrat, is from the Citrus 
Medica, the true citron or cedrat tree. The 
oil is also obtained by the sponge process—fur- 
ther account, see oils. Originof the name un- 
certain, but supposed to be Sanskrit or Arabic. 
There are said to be some 20 or 30 varieties of 
lemons and oranges, many of which are never 
seen in commerce. 
Macis, Mace, Myristica Fragrans.—Natural 
order Myristicacee. The outer covering (aril- 
lus) of the nutmeg. This covering of the seed 
occurs in thin bands and often unevenly divided 
orcut. It is of an orange-brown color; about 
