159 
sprayed with the Bordeaux mixture four times, viz, May 28, June 6, 
June 29, and July 10. Four varieties were included in the experiment, 
viz, Early Ohio, Early Oxford, Puritan, and Lee’s Favorite. 
(3) The season proved favorable for the development of the blight, 
which appeared in the experimental field about the middle of June, and 
did serious damage for the next six weeks. 
(4) The sprayed vines showed much less iujury than their unsprayed 
companions, remaining green after the others were dead. 
(5) The crop was harvested August 22, and the product of 12J feet 
of the sprayed part of each row was compared with the product of an 
equal distance of the unsprayed portion of the same row. The results 
have been summarized as follows: 
(a) From the treated portions of four rows of the Early Ohio variety, 
536 potatoes, weighing 07 pounds 4 ounces, were obtained, of which 231 
were of marketable size and weighed 48 pounds 6 ounces; while from 
the untreated portions of the same rows 490 potatoes weighing 50 pounds 
were obtained. 200 of which were marketable, and weighed 34 pounds 
4 ounces. There was thus an increase in favor of the treated hills of 17 
3 * 
pounds 4 ounces total product, and 14 pounds 2 ounces marketable 
product. 
(b) The treated portions of five rows of Early Oxford potatoes yielded 
a total of 622 tubers, weighing 87 pounds 1 ounce, of which 321, weigh¬ 
ing 70 pounds 4 ounces, were marketable, while the untreated hills of 
the same rows yielded a total of 707 tubers, weighing 77 pounds 4 ounces, 
of which 267, weighing 53 pounds 2 ounces, were marketable. There 
was thus an increase in favor of treated hills of 9 pounds 13 ounces 
total product, 17 pounds 2 ounces marketable product. 
(c) The treated portions of six rows of the Puritan variety yielded a 
total of 727 potatoes, weighing 93 pounds 6 ounces, 327 of which, weigh¬ 
ing 70 pounds 4 ounces, were marketable, while the untreated portions 
of the same rows yielded 810 potatoes, weighing 83 pounds 12 ounces, 
of which 266, weighing 53 pounds 15 ounces, were of marketable size. 
There was thus an increase in favor of the treated hills of 9 pounds 10 
ounces total, and 16 pounds 5 ounces marketable product. 
(d) From the sprayed portions of five rows of Lee’s Favorite potatoes, 
584 tubers, weighing 72 pounds 12 ounces, were obtained, of which 249, 
weighing 55 pounds 4 ounces, were marketable; while the unsprayed 
portions of the same- rows yielded 658 tubers, weighing 63 pounds 4 
ounces, 175 of which were of marketable size, and weighed 38 pounds 
12 ounces. Consequently, there was a difference in favor of the sprayed 
hills of 9 pounds 8 ounces total weight, and .16 pounds 8 ounces mar¬ 
ketable weight. 
(6) By combining the results given in paragraphs a, 5, c, and d, we 
find that the treated portions of the twenty rows yielded a grand total 
ot 2,471 potatoes, weighing 320 pounds 7 ounces, and that 1,128 of these 
were of marketable size, and weighed 244 pounds 2 ounces ; while the 
