1896. ] Current Literature. 379 
ing notice on p. 252 which the senior author gave it. Although pre- 
liminary notices of this work have been given in various places, the 
full paper is now published for the first time with adequate illustra- 
tions and is particularly important as making known the symptoms, 
nature, and preventive treatment cf another bacterial disease. The 
disease was discovered by Dr. Arthur in 1887-8. In January, 1889, 
Mr. Bolley’s work began and continued for about a year and a half, 
since which time Dr. Arthur has continued the investigation. 
Bacteriosis is a widespread disease of carnations, affecting primarily 
the leaves, thereby checking growth and productiveness. It is caused 
by a parasitic bacterium, entering the plant from the air through sto- 
mata or the punctures of aphides, which has been isolated and de- 
scribed as a new species, Bacterium Dianthi. The disease shows itself 
first by producing minute translucent yellowish spots, visible when the 
leaf is looked at against astrong light. These spread and the leaf finally 
Withers and dries up. Other pinks may be artificially infected but the 
chief damage is to carnations, especially old and weak or poorly grown 
Plants. It may be almost wholly prevented by keeping the foliage dry 
and free from aphides. Wire netting bent into A-shape and placed 
between the rows of plants supports the foliage and permits proper 
Watering without wetting the leaves. Overhead spraying should be 
done occasionally on bright days with water containing a small amount 
of ammoniacal copper carbonate. 
The Paper is illustrated by eight plates, of which two are remark- 
ably fine chromolithographs. The four drawn by Mr. Bolley are rather 
‘ude. Two others are half-tones, showing proper methods of growing 
houses at Lafayette, Ind., and Queens, N. 
