A Compendium of the Course of Chemical Instruction in the Medical Department of the University of Pennsylvania: By Robert Hare...J.G. Auner, 1836 - 530 pages |
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Compendium of the Course of Chemical Instruction, in the Medical Department ... Robert Hare No preview available - 2017 |
A Compendium of the Course of Chemical Instruction in the Medical Department ... Robert Hare No preview available - 2017 |
Common terms and phrases
acetate aëriform affinity air pump alcohol alkali ammonia antimony apparatus arsenic arsenious acid atmospheric air atom attraction Berzelius bioxide blowpipe body boiling brass bromine bulb bulk caloric carbonic acid cause cavity chemical chlorine chlorohydric acid chlorous acid coating cock cold colour combination combustion compound condensation conductor consequence consists copper crystals cylinder decomposed dissolved distillation electricity employed equivalent ether excited Experimental Illustrations exposed fluid fluoboric acid fluorine glass globe gold heat Hence hydrate hydrogen ignition inches iron knob lime liquid matrass means mercury metal mixture nitrate nitric acid nitrogen obtained orifice oxide oxygen pane particles phosphorus pipe piston plate platinum portion potash potassium precipitated pressure produced properties proportion protochloride protoxide quantity receiver resin salts screw selenium sesquioxide silver soda soluble solution specific gravity steam substances sulphate sulphide sulphuric acid surface temperature Thenard thermometer tion tube valve vapour vessel volatile weight wire zinc
Popular passages
Page xvi - it may be defined, the science which investigates the composition of material substances, and the permanent changes of constitution, which their mutual actions produce.
Page 123 - ... test of difference of refrangibility : and the conclusion deduced by Newton is no longer admissible as a general truth : " That to the same degree of refrangibility ever belongs the same color, and to the same color ever belongs the same degree of refrangibility." By absorbing the excess of any color at any point of the spectrum above what is necessary to form white light, we may actually cause white light to appear at that point, and this white light will possess the remarkable property of remaining...
Page 123 - ... at any point mixed with white light. In the red space there is more red than is necessary to make white light with the small portions of yellow and blue which exist there ; in the yellow space there is more yellow than is necessary to make white light with the red and blue ; and in the part of the blue space which appears violet there is more red than yellow, and hence the excess of red forms a violet with the blue.
Page 104 - I was subsequently enabled to employ this process, in dividing large vessels, of four or five inches in diameter, and likewise to render it in every case more easy, and certain, by means of a piece of plank forked like a bootjack...
Page xvi - Chemistry is that science which treats of those events or changes, in natural bodies, which are not accompanied by sensible motions.
Page 481 - ... the outset of the process, that I was induced, about twelve or fifteen years ago, to introduce an apparatus in which they were gradually added together within a glass bottle, by means of glass funnels with glass cocks. Subsequently I adopted the more simple apparatus represented in the accompanying figure. Providing a bottle with three tubulures, let one tubulure communicate by means of a recurved tube A, with another tube passing perpendicularly through an open-necked inverted receiver C, and...
Page 184 - ... by its reaction with the zinc, cause hydrogen gas to be evolved rapidly. As soon as the cock is closed, the hydrogen expels the acid from the cavity of the bell ; and consequently, its reaction with the zinc is prevented, until there be reason for drawing off another portion of the gas.
Page 122 - ... ever belongs the same degree of refrangibility.' " With the view of obtaining a complete analysis of the spectrum, I have examined the spectra produced by various bodies, and the changes which they undergo by absorption when viewed through various coloured media, and I find that the colour of every part of the spectrum may be changed, not only in intensity, but in colour, by the action of particular media ; and from these observations, which it would be out of place here to detail, I conclude...
Page 13 - Lennape (Del.) language, which was referred to the Historical and Literary Committee. Dr. Horner read a communication entitled " Note of the Remains of the Mastodon, and some other extinct Animals collected together in St. Louis, Missouri. By WE Horner, MD, Professor of Anatomy in the University of Pennsylvania," which was referred to a committee. Mr. Ord directed the attention of the Society to the following passage in Audubon's
Page 110 - This lateral passage communicates with a hole bored vertically into the wood, by a centre-bit ; and a small strip of the leather, being extended so as to cover this hole, is made, with the addition of some disks of metal, to constitute a valve opening upwards. In the bottom of the cask, there is another valve, opening upwards. A piston rod, passing perpendicularly through the pipe, from the handle ( H ,) is fastened near its lower end, to a hemispherical mass of lead (L.) The portion of the rod beyond...