568 Wisconsin Academy of Sciences, Arts, and Letters. 
7 — 7 — 2 —3—4—5—3—4 
Total, 35—- 10 % of the total number (340) of sporanges in 
this experiment. 
When the centers of the openings were 16 centimeters apart, 
the corresponding areas contained, respectively, 
6 —5—0—2—1—1 —3—2—6 
Total, 26—8% of the total number (315) of sporanges 
bred. 
Compare with these, the numbers of sporanges found in the 
median region of l'O strips, when the distance between the 
centers of the openings was 17 centimeters: 
0 — 0 — 1 — 1 — 0 — 0 — 1 — 1 — 1—0 
Total, 5—3% of the total number (151) of sporanges fired. 
In the remaining experiments, as the distance between the 
openings was increased still further, the two discrete groups 
were maintained and the intervening area grew correspond¬ 
ingly wider. 
The complete data, of this series of experiments are given 
in Table IX. Each horizontal row of figures in this table 
represents the whole number of sporanges striking the glass 
in a day, that is in one experiment. The total for each ex¬ 
periment is given at the left. The numbers in bold-faced type 
in each row represent the strips which include the openings. 
Between the records for these two areas in each case are given 
in order the number of sporanges found in each of the centi¬ 
meter-wide strips between the two openings. Heading out¬ 
ward from the area covering each opening, the figures repre¬ 
sent the contents of 9 similar areas, the first 4 being recorded 
separately, and the five outermost (comprising usually a very 
small number of sporanges) being given collectively. The angle 
between the two sets of light rays reaching the culture has been 
computed in some cases and is given at the left of the table' in 
the column immediately following the totals. 
