Dimorphic Anthers of Lager stroemia indica. 501 
For these experiments material was collected in the morning between 
eight and nine o’clock. Buds which were ready to open, or flowers which 
had just opened, were selected. In no case were anthers which had begun 
to dehisce employed for weighings. 
For each comparison the weighings of the two types of anthers were 
made at approximately the same intervals of time. Conditions probably 
differed somewhat from series to series, but since they were the same for 
both kinds of anthers in any one lot, the comparison may be considered 
satisfactory. The general qualitative results of every individual experiment 
were unquestionably the same. Exact comparisons of the curves obtained 
for the different examinations is a matter of little importance for our 
immediate purposes. 
In the tables 1 are given the actual weights of the masses of red and 
yellow anthers at different times, the absolute decrease of the weight at the 
last recording, and the percentage decrease calculated on the basis of the 
original weight . 2 
It is clear that if the red anthers lose water more rapidly than the 
yellow, their percentage loss will, in the early weighings, be greater than 
that of the yellow. If both series are practically completely desiccated, it is 
also clear that in the later periods the yellow must lose a higher percentage 
of their original moisture than the red, since the latter must have lost the 
greater part of their water early in the process of desiccation. A study of 
the tables shows this to be the case. The exact quantitative relationships 
vary greatly from table to table, as must be expected from the diversity 
of method in the carrying out of the weighings. Notwithstanding these 
inequalities the rule holds without exception for both published and 
unpublished experiments. 
The best method of comparison is to sum the percentage of water lost 
by each type of anther up to, and including, any given weighing. The 
results of such summations are shown graphically for series A-C, in which 
in his observations on this species, be a factor of some importance. Of course, the Orient would be 
the best place for such studies, but the Southern States, where the species is hardy out of doors 
throughout the year, would afford much better material than our northern gardens. 
Again, the anthers are minute and the weighings upon which our conclusions rest must be done 
on very small masses of material, which to be of value must be collected with great rapidity. I am 
under the greatest obligation to Mr. Dean H. Rose and to Miss Olive Kerley for the exceedingly 
exacting routine work. If subsequent observers find errors in our work, or conclusions, they are to 
be attributed to me rather than to my two assistants, who were most conscientious and more deft 
and rapid in the manipulation of chemical balances than I. 
1 Table A gives the results of one of six series of weighings carried out by Mr. Rose. The 
remaining five series of comparative weighings made by him led' to the same results and are not 
published. The data of the other tables are due to Miss Kerley. 
2 These tables are of two kinds. In A-C the loss every few minutes (except as noted) for a 
period of several hours is recorded. In D-G fewer weighings were made over a longer period of 
time, the anthers being allowed to become nearly or quite air dry. Experiments B and C were also 
carried over to the second day; hence in these cases, the summed percentage loss up to certain 
selected intervals is included for the sake of comparison in the second set of tables. 
