Farther Inquiries Into the Changes Induced on Atmospheric Air, by the Germination of Seeds, the Vegetation of Plants, and the Respiration of AnimalsW. Blackwood, 1811 - 375 pages |
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acid gas action affinity afforded agency of light alkali alkaline matter animal appears atmospheric air attraction blood bodies bonic acid carbonic acid cause chemical chemical affinity circumstances colour of plants colourable matter combination combustion common air confined contained cubic inches decomposed decomposition Dr Priestley effects electricity employed equal etiolated exert exhibit expelled experiments exposed facts farther fluid formed function gases gen gas germination glass green colour heat Hence hydrogen Ibid infusion Ingenhousz inverted juices leaf leaves likewise lime water living lungs manner ments mercury muriatic acid nature nearly nitrogen nitrogen gas observed operation oxides oxygen gas perfect darkness phenomena Phil Phys placed portion present produced proportion pure quantity Recherches Chim rendered respiration Saussure says Scheele seeds Senebier shade shew shewn similar solar light solution substance sunshine supposed temperature tion Trans trogen vege vegetation vessel violet Voltaic pile yellow
Popular passages
Page 209 - Have not the small Particles of Bodies certain Powers, Virtues or Forces, by which they act at a distance, not only upon the Rays of Light for reflecting, refracting, and inflecting them, but also upon one another for producing a great Part of the Phenomena of Nature? For it's well known, that Bodies act one upon another by the Attractions of Gravity, Magnetism, and Electricity; and these instances shew the Tenor and Course of Nature, and make it not improbable but that there may be more attractive...
Page 209 - How these attractions may be performed, I do not here consider. What I call 'attraction' may be performed by impulse, or by some other means unknown to me. I use that word here to signify only in general any force by which bodies tend toward one another, whatsoever be the cause.
Page 184 - ... being burnished, was evidently copper; but the opposite wire had no such coating. Upon reversing the direction of the current of electricity, the order of the phenomena was of course reversed ; the copper being shortly redissolved by assistance of the oxidating power of positive electricity, and a similar precipitate formed on the opposite wire.
Page 274 - ... much better than in common air, but I had not then given it any name. At this all the company, and Mr. and Mrs. Lavoisier as much as any, expressed great surprise.
Page 209 - The attractions of gravity, magnetism and electricity, reach to very sensible distances, and so have been observed by vulgar eyes; and there may be others which reach to so small distances as hitherto escape observation; and perhaps electrical attraction may reach to such small distances, even without being excited by friction.
Page 180 - Ritter, and some other philosophers, with regard to the elementary nature of water, and perfectly to confirm the great discovery of Mr. Cavendish. M. Ritter conceived that he had procured oxygen from water without hydrogen, by making sulphuric acid the medium of communication at the negative surface ; but in this case sulphur is deposited, and the oxygen from the acid and the hydrogen from the water are respectively repelled, and a new combination produced.
Page 254 - At inductio quae ad inventionem et demonstrationem scientiarum et artium erit utilis, naturam separare debet, per rejectiones et exclusiones debitas ; ac delude post negativas tot quot sufficiunt, super affirmativas concludere ; quod adhuc factum non est, nee tentatum certe, nisi tantummodo a Platone, qui ad excutiendas defmitiones et ideas, hac certe forma inductionis aliquatenus utitur.
Page 345 - Fevrier 1807, page 187, are rendered of little avail in consequence of the circumstances stated in the text. In the only case of vegetation in which the free atmosphere was excluded, the seeds grew in white sand, which is stated to have been purified by washing in muriatic acid ; but such a process was insufficient to deprive it of substances which might afford carbon, or various inflammable matters.
Page 345 - ... there seems however every reason to believe that the metallic bases of the alkalies, and the common metals, will stand in the same arrangement of substances ; and as yet we have no good reasons for assuming the compound nature of this class of...
Page 346 - ... and the free atmosphere almost constantly holds in mechanical suspension solid substances of various kinds. In the common processes of nature, all the products of living beings may be easily conceived to be elicited from known combinations of matter. The compounds of iron, of the alkalies, and earths, with mineral acids, generally abound in soils. From the decomposition of basaltic...