118 
found them particularly concerned over the increasing preva- 
lence of the “lemon scab” disease, which they regard as a serious 
menace to the grape-fruit industry. Spraying with Bordeaux 
mixture helps to control the disease, but this method presents 
many difficulties. The water-haul in some instances is very 
long, and extremely slow with ox teams, so that the time con- 
sumed and expense involved makes adequate spraying prohibitive. 
During the dry season, when cisterns run low, it is in fact next 
to impossible to secure sufficient water for this purpose. Profes- 
sor Whetzel therefore suggested a try-out with the dry dusting 
devices which have proved so economical of time and otherwise 
successful in the control of apple diseases in New York State.* 
Arrangements were concluded whereby Mr. Langley, our host at 
Barceloneta, should secure a hand dusting machine and should 
cooperate in an experiment to try the efficiency of dry sulphur 
and other materials in the control of their fungous diseases. 
This was later, on our return in April, tried out on a small scale, 
on both nursery stock and large grape-fruit trees, and some pre- 
liminary reports from Mr. Langley seem to indicate the com- 
plete success of the experiment. 
On February 26, we went on further by train to Mayaguez, on 
the southwest corner of the Island, where we proposed making 
headquarters for some weeks. Here are located the Federat 
Agricultural Experiment Station and the Agricultural College. 
To members of the staff of both these institutions, we are under 
great obligations for many courtesies; everyone, in fact, with 
whom we came in contact took much interest in our work and 
contributed in various ways to its success. In particular, to 
ean Garwood and Profesor Hunn, of the College, as well as to 
Director May, Mr. Brandes, and others of the Experiment Sta- 
tion, I wish to express our hearty appreciation of many favors. 
We found the general environment at Mayagiiez extremely 
favorable for our work; our living arrangements with a small 
group of college and high-school teachers being more than merely 
satisfactory, and the climatic and other conditions being almost 
ideal for the growth of parasitic fungi. We found in fact over 
* See Cornell Univ. Agr. Exp. Sta. Bulls. 340, 354, 369; Circ. 32, Ex- 
tension Bull. 1 
