224 



act a.s iuci'ustiug materials, or particularly in case of the lime, to com- 

 biue with acids, such as oxalic, which undergo no further metamor- 

 phosis at the close of the period of growth. We give below a table 

 showing the analytical results which he obtained : 



One thousand ■partH of fresh becch-lcaves gafc — 



One thousand parts dry substance gave — 



CelluloBe 



Non-nitrogenoiw extract 



Fat 



Proteiuo bodies 



Ash 



Soda 



Potasaa 



Peoroxide of iron 



Lime 



Magne.sia 



Phosphoric acid 



Silicic acid , 



255.20 



493. 08 



49.40 



78.12 



114.20 



1.58 



6.60 



0.59 



37. 6J 



8.20 



1.21 



26.4 



One hundred parts of ash gave — 



Soda 1 3.28 



Pofassa I 31.23 



Peroxide of iron i 0. 76 



Lime ! 14.96 



Magnesia i 7. 65 



Phoshoric acid 1 21.27 



Silicic acid I 1.87 



Undetermined 1 18.98 



1.32 

 21.74 



0.99 

 24.25 

 11.44 



8.43 

 10.47 

 21.36 



0.37 

 11.85 



0.78 

 27.82 



9. 18 



5.24 

 16.26 

 28.50 



1.34 



5.78 



0.58 



32.92 



7.15 



1.08 



23.18 



27.96 



Liberation of ozone hy plants. — In a note by J. Bellucci upon this snb- 

 Ject, presented to the Academy of Sciences of Paris, the author reviews 

 the statements of M. Scoutetten and M. Cloe^ with this regard, and 

 their methods for obtaining the results which formed the basis of their 

 conclusions. Believing that they were erroneous, he instituted a series 

 of experiments to substantiate his own views. He caused a current of 

 air to pass into a glass vessel of ten liters capacity, containing growing 

 plants, and in some cases branches or leaves recently cut. Before en- 

 tering the vessel the air passes through a glass tube sixty centimeters in 

 length, half of which is covered with black paper, the other half remain- 

 ing under the ordinary conditions. Having entered the vessel it passes 

 out through another tube similar to that just described, and from this 

 into the atmosphere. In the interior of each of these tubes are placed 

 iodized starch papers, one in the clear part and another in the dark 

 portions of the tube. The air, which traverses the apparatus at the 

 rate of 20 liters per hour, may be humid and may contain y^^ its volume 

 of carbonic acid. The apparatus is completely exposed to direct sun- 

 light during the experiment. 



