542 Wisconsin Academy of Sciences, Arts, and Letters. 
moved back to a distance of 50 centimeters. The culture was 
moved back 2 centimeters each day from 2 centimeters to a final 
distance of 94 centimeters from the opening. 
The first day, with the culture at 2 centimeters from the 
opening, 255 sporanges were found on the glass. 50 of these 
(19.6%) were on area 1, 201 (78.8%) Were on area 2, making 
98% on the area covered by the opening. Only 4 (1.5%) 
were on area 3 and none at all on area 4. 
At 4 centimeters distance from the opening, 130 sporanges 
were discharged. 71 (54.6%) were on area 1, 49 (37.6%) on 
area 2, and 5 (3.8%) on each of the two areas 3 and 4. In 
this case, 92.2% were on the area covered by the opening. 
7.6% fell beyond the opening. 
The total number of sporanges counted on the glass when the 
culture was at 6 centimeters distance was 301. 135 of these 
(44.8%) were found on area 1, 156 (51.8%) on area 2, 
(0.9%) on area 3, 7 (1.6%) on area 4. In this case, 96.3% 
were on the part of the glass covering the opening and less than 
5% failed to strike the illuminated area. 
With the culture at 12 centimeters distance, 104 sporanges 
were found on the glass. Of these', 61.5% were on area 1; 
30.7% on area 2; 6.7% on area 3, and 0.9% on area 4. There 
were then 92.2% on the opening, the percentage of sporanges 
outside the illuminated area being 7.6. 
At 26 centimeters distance a weak culture which produced 
only 43 sporanges was used, 65.1% falling on area 1; 23.2% 
on area 2 ; 4.6% on area 3, and 6.9% on area 4. 88.3 per 
cent are on the area covering the opening. 11.5% are found 
outside of that area. 
With the culture at 36 centimeters distance, the total num¬ 
ber of sporanges discharged was 218. 22.4% of this number 
were outside the illuminated area. 
With the culture at 48 centimeters distance, 99 sporanges 
were discharged on the glass. Of these, 54.5% were outside 
the area covering the opening. As the culture was moved still 
further back, the number diminished, until at 70 centimeters 
distance only 1,1'% were on areas 1 and 2. At 94 centimeters 
