THE OLDER HYBRIDISTS 173 
which has introduced order into this previously chaotic 
region, and which has enabled a few workers to estab- 
lish in half a dozen years the foundations of a great 
science, the importance of which is not at all generally 
realized. 
BIBLIOGRAPHY. 
K6LREUTER, J. G.: Vorlaufige Nachricht von einigen das 
Geschlecht der Pflanzen betreffenden Versuchen und 
Beobachtungen, 1761. 
GAERTNER, C. F. von: Bastarderzeugung, 1849. 
Focke, W. O.: Die Pflanzen-Mischlinge, 1881. 
Wicuura, M.: Die Bastardbefruchtung im Pflanzenreiche, 
1865. 
Dasa C.: The Effects of Cross and Self Fertilization. 
