1905] CURRENT LITERATURE 383 
probably means that the lacking electrolytes are produced by dissociation upon 
passing the induction current. Killed tissues show no blaze currents.— B. 
TREBOUX*° in a preliminary paper announces that for chlorophyllous plants 
the source of N par excellence is the ammonia radicle, rather than amido-acids. 
The significance whereof lies in its relation to a general pate of proteid syn- 
thesis to which the author has been led by his experiments.—C. R. B. 
Von Spiess shows‘! that the so-called green aleurone does not exist, such 
grains being really more or less degenerate chloroplasts. Bluish aleurone grains 
occur in maize, the color being due to anthocyan.—C. R. B. 
Gatin*? has described cases of polyembryony in two palms, Phoenix canarien- 
sis and Pinanga patula, but gives no account of the origin of the embryos.—J. M. C. 
BONNIER 43 has compared in detail the embryo sac of gymnosperms and 
angiosperms, reaching the conclusion that the most pate tee difference 
between the two groups is that in gymnosperms all the eggs formed in an embryo 
sac are alike; while in angiosperms the two eggs usually produced are unlike, one 
forming the embryo, the development from the other stopping at the proembryo 
Stage (endosperm). This is an effort to include double fertilization in con- 
trasting gymnosperms and angiosperms, but does not explain anything.—J. M. C. 
Miss RIDDLE 44 has studied the Fei of Staphylea trifoliata from the 
megasporangiate archesporial cell of the embryo. The account presents no 
unusual features, but it is a matter of interest to note that double fertilization was 
observed. A is account of some of the forms of Sapindales was muc 
needed.—J. M 
4° TrEBouX, O., Zur Stickstoff-Ernahrung der griinen Pflanzen. Ber. Restart. 
Bot. Gesells. 22: 570-372. 1905. 
41 Von ee Kart, Ueber die Farbstoffe des Aleurone. Oesterr. Bot. Zeits. 
54:440-446. 1904 
42 Gatin, C. L., Ee a cas de polyembryonie chez plusieurs espéces de palmiers. 
Rey. Gén. Botanique 17:60 
43 BONNIER, GASTON, halen sur la comparaison entre les ai aa 
les gymnospermes. Rev. Gén. Botanique 17:97-108. figs. 6. 1905. 
44 RippLe Lumrna C., Development of the embryo sac iia embryo of Staphylea 
drijoliata. Ohio Naturalist 5: 320-325. pls..19-20. 19095- 
