Dyeing Properties of Lichens. 391 
TABLE XIII. 
Showing a number of species whose alcoholic infusion does not yield 
with ammonia the kind or intensity of tint, which we should 
i priori expect from the blood-red tint struck by solution of 
chloride of lime. 
Action of Chloride Action of Ammonia 
Name of Lichen of Lime on alcoholic om alcoholic infu- 
infusion. sion. 
Borrera furfuracea Blood-red Greenish-brown 
Gyrophora heteroidea “Pe Reddish-brown 
hyperborea ee Orange-yellow 
spadochroa te Brownish-yellow 
proboscidea 
erosa ee 
pellita ee . 
Lecanora parella na ; Orange-yellow 
Lepraria incana Cherry-red Reddish-yellow 
Parmelia dubia Blood-red Greenish-yellow 
rimosa v. sordida ote Orange-yellow 
tiliacea ie Wis 
olivacea ve Greenish-yellow 
fahlunensis o Brownish-yellow 
rubiginosa ae Greenish-yellow 
Ramalina fraxinea var. Brownish-red = Brownish-yellow 
ao — sie Orange 
Roccella tinctoria & var., 3 \ Blcad ted ap nts 
specimens 
fuciformis, 5 specimens 
Montagnei bas site 
Umbilicaria senea iets Brownish-yellow 
Urceolaria scruposa An Greenish-yellow 
This table also shows the fallacy of Stenhouse’s test, in certain 
cases, for here it leads us to form anticipations which are not realized. 
It is not, however, necessary—it may be a mere coincidence—that 
the development of a red colour by this test, and by Helot’s (ammo- 
nia) test usually coexist, so that from the presence of the one reac- 
tion we are justified in expecting that of the other. Of the precise 
chemical nature of these reactions we know little or nothing. 
