Conversations on Chemistry: In which the Elements of that Science are Familiarly Explained and Illustrated by Experiments : from the 5th and Latest English Ed., Rev., Corr., and Considerably Enl. : to which are Added, Notes and Observations by an American Gentleman

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Printed, published and sold by Denio & Phelps, 1820 - 420 sider
 

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Side ii - Co. of the said district, have deposited in this office the title of a book, the right whereof they claim as proprietors, in the words following, to wit : " Tadeuskund, the Last King of the Lenape. An Historical Tale." In conformity to the Act of the Congress of the United States...
Side ii - CLERK'S OFFIcE. BE it remembered, that on the eleventh day of November, AD 1830, in the fiftyfifth year of the Independence of the United States of America, Gray & Bowen, of the said district, have deposited in this office the title of a book, the right whereof...
Side vi - ... purpose. In writing these pages, the author was more than once checked in her progress by the apprehension that such an attempt might be considered by some, either as unsuited to the ordinary pursuits of her sex, or ill-justified by her own imperfect knowledge of the subject.
Side 29 - For an elementary body is one that has never been decomposed, that is to say, separated into other substances: and fire, air, earth, and water, are all of them susceptible of decomposition. EMILY. I thought that decomposing a body was dividing it into its minutest parts. And if so, I do not understand why an elementary substance is not capable of being decomposed, as well as any other.
Side 160 - ... violence it combines with oxygen, by burning some of it in that gas. We must manage the experiment in the same manner as we did the combustion of sulphur. You see I am obliged to cut this little bit of phosphorus under water, otherwise there would be danger of its taking fire by the heat of ray fingers.
Side 143 - H2O, our intuitions and instincts both know it is not so. But they are bullied by the impudent mind. Whereas if we said that water, under certain circumstances, produces two volumes of hydrogen and one of oxygen, then the intuitions and instincts would agree entirely. But that water is composed of two volumes of hydrogen to one of oxygen we cannot physically believe. It needs something else. Something is missing. Of course, alert science does not ask us to believe the commonplace assertion of: water...
Side 77 - ... place previously to the cooling of the atmosphere ; for on examining the temperature of a plot of grass just before the dew-fall, he found that it was considerably colder than the air a few feet above it, from which the dew was shortly after precipitated. Emily. But why should the earth cool in the evening sooner than the atmosphere ? Mrs.
Side 57 - You must observe, in the first place, that the effect of this tendency is gradually to bring all bodies that are in contact to the same temperature. Thus the fire which burns in the grate, communicates its heat from one object to another, till every part of the room has an equal proportion of it. Emily. And yet this book is not so cold as the table on which it lies, though both are at an equal distance from the fire. and actually in contact with each other, so that, according to your theory, they...
Side 96 - Caroline, do not approach too near it, for it has a very pungent smell. 1 shall show you another instance similar to that of the water, which you observed to become warmer as it froze. I have in this phial a solution of a salt called sulphat of soda or Glauber's salt, made very strong, and corked up when' it was hot, and kept without agitation till it became cold, as you may feel the phial is.
Side 74 - ... attention at present to the solutions by water and caloric. Caroline. But there are a variety of substances which, when dissolved in water, make it thick and muddy, and destroy its transparency. Mrs. B. In this case, it is not a solution, but simply a mixture. I shall show you the difference between a solution and a mixture, by putting some common salt into one glass of water, and some powder of chalk into another; both these substances are white, but their effect on the water will be very different....

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