Science Lectures for the People, Volumes 5-6John Heywood., 1874 |
From inside the book
Results 1-5 of 54
Page 11
... able on turning the bundle round entirely to extinguish the transmitted ray . By putting together in this way a few pieces of glass , say 1 inch in length , and one inch in breadth , and by looking through the bundle obliquely at an ...
... able on turning the bundle round entirely to extinguish the transmitted ray . By putting together in this way a few pieces of glass , say 1 inch in length , and one inch in breadth , and by looking through the bundle obliquely at an ...
Page 28
... able to excite the protrusion of the pollen - tubes from the pollen - grains . When we look for the stamens , however , we shall find that the anthers have completely withered up , the pollen having been , in fact , discharged from them ...
... able to excite the protrusion of the pollen - tubes from the pollen - grains . When we look for the stamens , however , we shall find that the anthers have completely withered up , the pollen having been , in fact , discharged from them ...
Page 30
... able weather ( fine and sunny with light breezes , and yet not so strong a wind as to disperse the pollen to too great a distance so that it will not perform the purpose for which it was designed ) at the time when the plants are in ...
... able weather ( fine and sunny with light breezes , and yet not so strong a wind as to disperse the pollen to too great a distance so that it will not perform the purpose for which it was designed ) at the time when the plants are in ...
Page 31
... able to be brought near it ; and hence those kinds which visit the flowers with long tubes are commonly provided with a long proboscis , as may be seen in butterflies , moths , and bees . But in a very large number of plants which ...
... able to be brought near it ; and hence those kinds which visit the flowers with long tubes are commonly provided with a long proboscis , as may be seen in butterflies , moths , and bees . But in a very large number of plants which ...
Page 38
... able to bring before you this evening , I trust that I have been able to show you that even in such an apparently simple operation of nature as the fertilisation of the flower , there is a boundless field for careful observation ...
... able to bring before you this evening , I trust that I have been able to show you that even in such an apparently simple operation of nature as the fertilisation of the flower , there is a boundless field for careful observation ...
Other editions - View all
Common terms and phrases
able acid animals appear atoms beautiful bird body bone burning called calx carbon carbonic acid Cave-earth cavern chemical colour contraction creatures crystals Dalton detonation disc distance earth earthquakes effect existence experiment explosive fact feathers feet fertilisation fibres flame flowers force give glass gun cotton gunpowder heat hyæna inch inflammable air insects instance iron Islands Isthmus of Tehuantepec John Dalton Kent's Cavern kind large number lava lecture light mammals Manchester marsupials mass means miles moon movements muscle muscular nature nerve nitric nitric acid object observe ovule oxygen parasites pass phenomena phlogiston plants plate polarisation pollen pollen-grains pollinia Priestley produced quantity region round saltpetre savages sensations species Stalagmite stamens stigma structure substance sun's supposed surface thickness transit of Venus Trichina tube valley Venus vibrations volcanic weight whole wing
Popular passages
Page 182 - A man so various, that he seemed to be Not one, but all mankind's epitome : Stiff in opinions, always in the wrong, Was everything by starts, and nothing long; But, in the course of one revolving moon, Was chemist, fiddler, statesman, and buffoon ; Then all for women, painting, rhyming, drinking, Besides ten thousand freaks that died in thinking.
Page 39 - FLOWER in the crannied wall, I pluck you out of the crannies, I hold you here, root and all, in my hand, Little flower — but if I could understand What you are, root and all, and all in all, I should know what God and man is.
Page 34 - Now at last we see the full use of every part of the flower, of the water-secreting horns, of the bucket half full of water, which prevents the bees from flying away, and forces them to crawl out through the spout, and rub against the properly placed viscid pollenmasses and the viscid stigma.
Page 200 - The feeling of it to my lungs was not sensibly different from that of common air, but I fancied that my breast felt peculiarly light and easy for some time afterwards. Who can tell but that in time this pure air may become a fashionable .article 1 Lee. cit. p. 94. in luxury ? Hitherto only two mice and myself have had the privilege of breathing it.
Page 34 - Catasetum, is widely different, though serving the same end; and is equally curious. Bees visit these flowers, like those of the Coryanthes, in order to gnaw the labellum; in doing this they inevitably touch a long, tapering, sensitive projection, or, as I have called it, the antenna. This antenna, when touched, transmits a sensation or vibration to a certain membrane which...
Page 95 - ... electricity,' and lecture learnedly about it, and grind the like of it out of glass and silk : but what is it ? What made it ? Whence comes it ? Whither goes it ? Science has done much for us; but it is a poor science that would hide from us the great deep sacred infinitude of Nescience, whither we can never penetrate, on which all science swims as a mere superficial film. This world, after all our science and sciences, is still a miracle ; wonderful, inscrutable, magical and more, to whosoever...
Page 34 - When the bee, thus provided, flies to another flower, or to the same flower a second time, and is pushed by its comrades into the bucket and then crawls out by the passage, the pollen-mass necessarily comes first into contact with the viscid stigma, and adheres to it, and the flower is fertilised.
Page 95 - At bottom we do not yet know ; we can never know at alL It is not by our superior insight that we escape the difficulty ; it is by our superior levity, our inattention, our want of insight. It is by not thinking that we cease to wonder at it. Hardened round us, encasing wholly every notion we form, is a wrappage of traditions, hearsays, mere words. We call that fire of the black thunder- cloud
Page 95 - We call that fire of the black thunder-cloud 'electricity,' and lecture learnedly about it, and grind the like of it out of glass and silk: but what is it? "What made it? Whence comes it? Whither goes it? Science has done much for us ; but it is a poor science that would hide from us the great deep sacred infinitude of Nescience, whither we can never penetrate, on which all science swims as a mere superficial film. This world, after all our science and sciences, is still a miracle ; wonderful, inscrutable,...
Page 184 - ... themselves when they heard I was to preach for him. But visiting that country some years afterwards, when I had raised myself to some degree of notice in the world, and being invited to preach in that very pulpit, the same people crowded to hear me, though my elocution was not much improved, and they professed to admire one -of the same discourses they had formerly despised.