148 
Plate X. Rosettes from a seedling tree near Sunny Side, Georgia. This tree 
showed symptoms of disease on only about one-half of its branches. 
On some of the branches the winter buds had germinated, especially 
toward the upper ends of the shoots. Photo, July 2, 1890. 
Plate XI. Diseased peach tree from the budded orchard of T. C. Wells, Manhattan, 
Kansas. Much smaller than the average. Healthy in 1889, but now 
affected in all parts. There were no injuries by borers, root aphides, 
root knot, or Scolytus. The winter buds were germinating on some 
of the tufts. Photo, August 10, 1890. 
Plate XII. Diseased branch from a seedling tree in the orchard of W. J. Griffing, 
Manhattan, Kansas. Whole tree affected in the same way. An ex¬ 
treme case of tufting. Photo, August 23, 1890. 
Plate XIII. Diseased branch from a seedling tree in the orchard of W. J. Griffing, 
Manhattan, Kansas. The wjiole tree was affected. Photo, August 
18, 1890. 
TUBERCULOSIS OF THE OLIVE. 
Plates xiv, xv. 
By Newton B. Pierce. 
During the summer of 1890, I enjoyed the opportunity of meeting, 
under the most pleasant circumstances, Dr. Luigi Savastano, professor 
of arboriculture of the Royal High School of Agriculture, at Portici; 
the latter a beautiful town situated at the base of Vesuvius, on the 
shores of the Bay of Naples. Dr. Savastano has recently done some 
excellent work on the tubercle disease of the olive, having conducted 
several series of experiments with cultures and inoculations which have 
resulted iu clearly demonstrating the bacterial nature of this most in¬ 
teresting malady. These experiments have been carefully repeated by 
Dr. Fridiano Cavara, of the well-known agricultural school of Pavia, 
south of Milan. The result has been equally conclusive and interest¬ 
ing. It was my good fortune and pleasure to meet both Drs. Briosi 
and Cavara of this school, and to have the opportunity of seeing much 
of their valuable work. The writer was shown an olive tree into which 
bacilli of the olive tuberculosis had been introduced, and which was 
showing at the points of infection well-developed tubercles. At its side 
stood another olive of like size and similarly conditioned, wiiich had been ' 
treated in all ways as its companion with the exception that the wounds 
made by the knife had never received the germs. No signs of a tuber¬ 
cle were to be seen upon this tree. The organisms used in these exper¬ 
iments were from artificial cultures. 
During the author’s labors in the Mediterranean region, tuberculosis 
of the olive was encountered at several places and under various con¬ 
ditions. On this account the liberty is taken to append a note or two to 
a translation of the published account of the concluding experiments 
of Dr. Savastano.* There is also given a reproduction of figures pub- 
* II Bacillo della Tubereoloei delV Olivo, Nota Suppletiva del dott. L. Savastano. 
Roma, 1889. 
