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Bog, hæftet The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Vol. 19: January-June, 1860 (Classic Reprint) af David Brewster

The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Vol. 19: January-June, 1860 (Classic Reprint)

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Excerpt from The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Vol. 19: January-June, 1860

The instrument consists of a glass tube, ab, in serted in a light half-pint ¿ask A, the connexion at e 1) being made air-tight 3 a thermometrical scale m ... Læs mere

Excerpt from The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Vol. 19: January-June, 1860

The instrument cons... Læs mere

Produktdetaljer:

Sprog:
Engelsk
ISBN-13:
9781334344749
Sideantal:
500
Udgivet:
01-11-2016
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Excerpt from The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, Vol. 19: January-June, 1860

The instrument consists of a glass tube, ab, in serted in a light half-pint ¿ask A, the connexion at e 1) being made air-tight 3 a thermometrical scale m n attached to the tube 3 a moveable barometrical scale C I) 3 Q a piece of very thin india-rubber tied over the top of the tube A B, to keep the external air from coming in contact with the strong sulphuric acid occupying a portion of the tube and ¿ask. The tube AB is about 24 inches long, and about gths of an inch internal diameter; it is secured to the ¿ask in the following manner z - Two perforated corks, e and fitting the neck of the ¿ask, are placed on the tube the lower one, e, is coated with a solution of india-rubber to render it impervious to air; the upper cork, '0, being raised a little, the cork c with the tube is pressed down to its proper depth some pieces of chemical cement, fusible at a gentle heat, are now placed above the cork e, and a gentle heat is applied until the cement melts the upper cork v is then brought down to its place upon the melted cement when the cement has cooled, the tube will be found firmly fixed in the ¿ask and perfectly air-tight. Strong sulphuric acid of commerce is introduced through the tube by means of a pipette, the tube being held in an inclined position.

N.b. All this process of cementing may be obviated by having a globe and tube bent in the manner shown in the succeeding diagram but I preferred Showing how the instrument may be constructed cheaply, and with materials which may be readily obtained.

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