Botany and — 409 
which, having done its work in the cells, is conveyed into the ducts 
and thenes to the leaves for a new elaboration. ry 
oo are Hanstein and Sachs, considering that latex is rich in 
milated matters, especially proteine, fit for nourishment, conclude 
elaborated sa ate: the caoutchoue, &e., in it may 
mentitious. 34 France, Faivre, who has etensit investigated the 
latex of Ficus elastic, has late ely and for five years studied that of 
the White Mulber He confirms the last mentioned view; and 
shows that the wie of this tree contains a large proportion of 
assimilable nourishing matter, both ternary and qu aternary, 
that this matter is ae mda by the plant in growth, in the 
ney of an elaborated sa 
isect-aid to Fertilization in plants, and the arrangements there- 
for, have been much studied of late by Hildebrand in German 
and Delpino in Italy. "The former a few years ago wrote a syste- 
matic treatise on the = which gate: be translated into iing- 
Hymenoptera, Diptera, and the wind. Delpino, in analyzing the 
Ph:enogamous flora of Nova Zembla , concludes that of its 124 flow- 
24 are fertilized by the wind. e 91 species in Spitzbergen, 
2 are saga 8 een 63 by "Hyweoptecs and Diptera, 
and 26 by th 
Fertilization in. in pie ous Cryptogamous plants. A valuable 
contribution has been made, by Strasburger, Professor in the Uni- 
versity of Warsaw. His papers on the fertilization of Ferns, &e., 
are published in the Memoirs of the Imperial Academy of St. Pe- 
— and the Bot. Zeitung for 1868, and are reproduced in 
_ French in the Ann. Sci. Naturelles. The inte eresting point is, that 
a nisin secreted in the canal of the archegonium or pistillidium 
and dise harged from its orifice es to tne 
ing spermatozoids and to direct senna course down to sey cell to 
be fertilized,—into which one or more of the spermatoz 
their way by their pointed end, while the other and peak td glob- 
extremity often breaks off es is left behind. 
The influence of stock up on and the converse, which has 
of late been much under reogeidration, appears to be well made 
out in one kind of ease, viz., in the propagation from the one to 
of variegation. The older facts of the sort are co 
