163. 
appeared to be normal Pteris aquilina. This disposed of’ a 
suspicion which had occurred to me that I might be dealing with 
two different species or varieties. 
Analyses were also made of the fronds at different periods 
during the summer and autumn, and the results are given in 
Table IT. , 
The fronds developed later at ‘‘ A,” the West Woods, than 
at ‘“ B,” the wood between the Chapel Park and Blue Breeks. 
The first samples from “ B,” No. 1 in the Table, were gathered 
on May 9th when they were from 2 to 12 in. high and just 
beginning to uncurl. The corresponding samples from “ A” 
were not taken till three weeks later, May 30th, and were even 
then only about 6 in. high and still curled. Both are high in 
moisture and relatively high in Nitrogen, and at this stage the 
Nitrogen is higher in the “ A” sample than in the “ B ” sample. 
The next samples were taken on June 18th, No. 2 in the 
Table, when the fronds at both places ranged up to 3 ft. in 
length. Those at “‘ B ” however were larger and better developed 
than those at “A,” which were relatively small and narrow. 
The “ B ” fronds were at this time considerably richer in Nitrogen 
and they also contained a distinctly higher percentage of moisture. 
It is noticeable that at this stage the non-protein Nitrogen is 
lower than at any other. This was an unexpected result, as, 
judging from general experience with Plant Analysis, one expected 
the proportion of non-protein Nitrogen to be considerable in an 
immature leaf. 
The next samples were taken on September 25th, when the 
fronds were turning yellow. Those at ‘‘ A” were already almost 
' completely yellow, while those at ‘‘B’’ were only yellow here 
and there. Though the ‘“‘ A ” fronds developed later, they turned 
yellow earlier. The two places are at nearly the same altitude, 
- about 300 ft. above sea level, but “A” is more exposed than 
“* B,”’ which is well sheltered. 
In these samples there is a great difference in Nitrogen, and 
the “A” sample is again considerably lower in percentage of 
moisture than the ““B”’ sample. In both cases the proportion of 
non-protein Nitrogen is greater than in any of the other samples. 
The final samples were taken on October 28th when the 
fronds were dead and brown at both places. The difference in 
Nitrogen persists in these dead fronds, those from “ B”’ havin 
almost exactly twice the percentage which was found in those 
Except the differences in Nitrogen and moisture, no other 
striking dissimilarity was found between the two sets of samples, 
and the fronds therefore, after they are developed, exhibit much 
the same peculiarity as the rhizomes, in that those from “B” 
are much richer in nitrogenous matter than those from “ A.” 
Samples of the soil were taken from both places to see if they 
exhibited any remarkable differences in Nitrogen content, or 
otherwise, which might throw light on the differences found in the 
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