79 
Plants. Time of the maximum. 
Erythroxylon Coca, var. Spruceanum Bek. . 3.45—5.50 
Delima sarmentosa. . -.. - . + + + «+ 12,ifthe weather 
is bright; if dull, after 12. 
Erythroxylon bolivianum. . . . - . + > 12.30—5.45 
Me MNONSIA gc og a go ee 12—5.30 
eR GSBATNICR ok = a oe Lee ee 12—5.30 
Manihot utilissima . 5 
Indigéfera anil 5) 
Carica Papaya. D 
Batatas edule. er RE OF eae 5) 
MES WDC. 5 eiccee  ee after 4.15 ') 
Antigonon leplopus««.... . 6 saa a ee 
Tnompea peltata ss. 5.0 ash ee ee eee L415 
Dioscores spec. .< hws eae ee Li} 
Nicotiana. Tabacni. 3s. oc ot. Se ot oh 5 
Boehmoria nivea . ur. Sts oo ee 5 
Paontlora alba coo ww ct 2 eo lar on 
Said th 25—4t 
Before entering upon a discussion of the above statements, 
I wish to refer to the outcome of some weighings of which 
the object was to express in weight the increase of organic 
matter inside the blade. The great majority of the experiments 
were made with two thriving shrubs of from 12 to 15 feet 
high. One of these was Connarus faleatus, the other Delima 
sarmentosa. Connarus has pinnate leaves; the soft coriaceous 
leaflets are dark green with a smooth glittering surface. For 
every experiment two leaves were selected and at different 
times deprived of their leaflets. In order to determine for in- 
stance how much dry matter was produced from 4—12, I took 
from each of the leaves two leaflets, consequently four at a 
time. From the exact middle (the acuminate apex disregarded) 
of each leaflet I cut a square piece, in such a way that the 
midrib divides the segment into two equal parts. These four 
1) At 22 there was rain, at 43 the sky was clouded. 
