Physiological Botany: Outlines of the histology of phaenogamous plants. Vegetable physiology. I.. II.Ivison, Blakeman, 1885 - 535 |
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absorption alcohol algæ amount appears assimilation atmosphere bark become Botanische Zeitung buds calcic carbonic acid cell-wall cells cellulose cent changes chemical chlorophyll chlorophyll granules circumnutation color containing cork cortex cotyledons crystals cutinized cylinder Darwin dicotyledons dilute dissolved ducts effect elements embryo endodermis epidermis examined experiments fertilized fibres fibro-vascular bundles flowers germination given glass grains green growth gymnosperms hairs inches instance internodes iodine layer leaf leaves light liquid lower plants mass matters micella microscope minute moisture monocotyledons movement nitrogen nucleus observed oösphere organs ovary ovule oxygen parenchyma petiole Pfeffer plants pollen pollen-grains pollen-tube portion potassic produced protoplasm radial radicle reagents roots Sachs seedlings seeds self-fertilized sensitive sér shown side soil soluble solution sometimes species specimen starch stem stoma stomata Strasburger structure substance sulphuric surface temperature thin threads tion tissues transpiration tube turgescence vegetable wall wood wood-cells woody yellow young
Popularne fragmenty
Strona 324 - I had that expectation when I first put a sprig of mint into a glass jar standing inverted in a vessel of water; but when it had continued growing there for some months, I found that the air would neither extinguish a candle, nor was it at all inconvenient to a mouse which I put into it.
Strona 223 - Low diffusibility is not the only property which the bodies last enumerated possess in common. They are distinguished by the gelatinous character of their hydrates. Although often largely soluble in water, they are held in solution by a most feeble force. They appear singularly inert in the capacity of acids and bases, and in all the ordinary chemical relations.
Strona 311 - Daubeny, that the chemical rays appear to have no effect upon the work of assimilation. He does not, however, offer any explanation of the curious fact that the chemical activity of the plant is dependent upon other rays than the chemical for its excitation. 827. The principal results obtained with submerged water plants by Cloez and Gratiolet,2 who exposed Potamogeton and 1 A Treatise on the Forces which produce the Organization of Plants, 1844, p.
Strona 223 - The colloidal, is, in fact, a dynamical state of matter; the crystalloidal being the statical condition. The colloid possesses Energía. It may be looked upon as the probable primary source of the force appearing in the phenomena of vitality.
Strona 344 - states that he has known "vigorous leaves to devour their prey several times ; but ordinarily twice, or quite often once, was enough to render them unserviceable." Mrs. Treat1 observes that " several leaves caught successively three insects each, but most of them were not able to digest the third fly, but died in the attempt. Five leaves, however, digested each three flies and closed over the fourth, but died soon after the fourth capture. Many leaves did not digest even one large insect.
Strona 263 - To ascertain the amount of this propulsive action, I took from the same tree, a Laurel, two equal shoots, and, placing them in the same dye, subjected them to conditions that were alike in all respects save that of motion : while one remained at rest, the other was bent backwards and forwards, now by switching and now by straining with the fingers. After the lapse of an hour I found that the dye had ascended the oscillating shoot three times as far as it had ascended the stationary shoot, this result...
Strona 194 - All are tall and upright columns, but they differ from each other more than do the columns of Gothic, Greek, and Egyptian temples. Some are almost cylindrical, rising up out of the ground as if their bases were concealed by accumulations of the soil ; others get much thicker near the ground like our spreading oaks ; others again, and these are very characteristic, send out towards the base flat and wing-like projections. These projections are thin slabs radiating from the main trunk, from which they...
Strona 301 - ... a gas is represented as consisting of solid and perfectly elastic spherical particles or atoms, which move in all directions, and are animated with different degrees of velocity in different gases. Confined in a vessel, the moving particles are constantly impinging against its sides and occasionally against each other, and this contact takes place without any loss of . motion, owing to the perfect elasticity of the particles.
Strona 417 - It is hardly an exaggeration to say that the tip of the radicle thus endowed, and having the power of directing the movements of the adjoining parts, acts like the brain of one of the lower animals...
Strona 416 - ... by which it is simultaneously pressed on opposite sides. If, however, the radicle is pressed by a similar object a little above the tip, the pressed part does not transmit any influence to the more distant parts, but bends abruptly towards the object. If the tip perceives the air to be moister on one side than on the other, it likewise transmits an influence to the upper adjoining part, which bends towards the source of moisture.