 | Massachusetts - 1875 - 692 頁
...the spongioles of the roots and the leaves are analogous structures, and certain tubes are united iu the roots, the downward current in autumn is accompanied...Furthermore, as some of the vascular expansions in the leaves arc free to absorb moisture, etc., in the same way that the spougioles are, it follows that the general... | |
 | James Bell Pettigrew - 1874 - 422 頁
...downward current, as happens in endosmose andj exosmose. • As moreover the spongioles of the root and the leaves are analogous structures, and certain...to absorb moisture, etc., in the same way that the spongioles are, it follows that the general circulation may receive an impulse from the leaves, or... | |
 | State Pomological Society of Michigan - 1875 - 592 頁
...upward rush of sap being followed by a slight downward current, as happens in endosmose andexosmose. As, moreover, the spongioles of the roots and the...to absorb moisture, etc., in the same way that the spongioles are, it follows that the general circulation may receive an impulse from the leaves or from... | |
| |
... and exosmose. As, moreover, the spongioles of the roots and the leaves are analogous structures, and certain tubes are united in the roots, the downward current in autumn is accompanied by a slight upward current. This accounts for the fact that at... 