1.77 
Vi 
V, 
ling thè udiometer with comrr.on air, thè 
luminosità (of thè wccd) ccntinued, and 
meanwhil e thè Kunkel * s fosforus hegari to 
giv light. Its lightj according to its 
custcm, continued untily^twenty 
oxygen had heen destroyd'f hut^H¥”‘'òTh^^ 
fragment slowly grew dim until it was ex- 
tinguisht when sixteen parts of thè cxygen 
(had heen used up). vVhen, howeverj I emp- 
ti ed thè water out cf thè udiometer from 
vvhich thè twknty parts cf cxygen had heen 
lost, and refild it v/ith as much corrmon air, 
thè fragment resumed its luminosi ty. 
Sec* 111: Ihls haf-decayd chestnut wood 
retaind its prcperty of fosf orescence for 
oniy two days. After this tliere was hrot 
to me another (specimen) , thè roct cf a 
heech tree (which) maintaind its light for 
three days» I knew then that this f acuì ty 
of giving light v;as restricted to a cer- 
tain seasóHj and mCTj that it depended di- 
restly on thè rate cf deccmpositicnj since 
I discoverd this prcperty laoking in thè 
crganized lorces (i.e., in thè livinp* or- 
ganismi McD) * It is superfulous to menticn 
thè resulta ohtaind with this seccnd fos- 
fcrus when imìmerst in oxygen, nitrogen, 
either pure or mixt with ordinary air, as . 
they did not di:^fer e^ssentially from thè 
recorded results which I ohservd with thè 
f i r-s t * . 
Sec. 112* In thè place where I made these 
experiments, was ah le to procure thè hy- 
drogenic gas of thè swamps, and vdth it I 
tested these twc fcsforic woods. But they 
Gonduoted themselvs (in it) as in nitrogen; 
thè light was of short duration» 'Then I 
puld thè udiometer vertioally out of thè 
water and allowd thè a ir to enter, hut thè 
iight was not resto rd (at all) or thè re- 
stcration was very weak* , The reason for 
this was qui te clear to me: Al tho this 
