A text-book on chemistryFor the use of schools and colleges . t isperfectly pure. Hydrogen is a transparent colorless body, having thehighest refracting power of all the gases. Comparedwith air it is as 6614 to 1000. When pure it has neithertaste nor smell. It is the lightest known body, onehundred cubic inches weighing grains —11,000times less than an equal bulk of water. The weightof its atom is taken as the standard of other atomicweights; it is therefore 1. It exerts no action on veg-etable colors, is only soluble to the extent of per cent,in water, and has never been liquefied. D
A text-book on chemistryFor the use of schools and colleges . t isperfectly pure. Hydrogen is a transparent colorless body, having thehighest refracting power of all the gases. Comparedwith air it is as 6614 to 1000. When pure it has neithertaste nor smell. It is the lightest known body, onehundred cubic inches weighing grains —11,000times less than an equal bulk of water. The weightof its atom is taken as the standard of other atomicweights; it is therefore 1. It exerts no action on veg-etable colors, is only soluble to the extent of per cent,in water, and has never been liquefied. During experi-ments for that purpose, it appeared that there is reasonto believe that its molecules are smaller than those of What is the use of the sulphuric acid? Describe the apparatusfor its production. What are the properties of hydrogen? THE PHILOSOPHERS LAMP. 231 any other body, as it could leak through stopcocks im-pervious to other gases. In the animal economy hydrogen does not exerciseany deleterious effect. When respired, it causes the Fig. Fin. 200. voice to assume a feeble, shrill tonelike that of a child, and a tendency tosleep. A bell rung in this gas emitsa more feeble sound than when ring-ing in an air-pump vacuum. If a jar,Fig. 199, with a stopCock at its upperend, be filled with hydrogen, and, be-ing depressed in the water of thetrough, the cock opened and a-lightbrought near the hydrogen, as it es-capes it takes fire at once,burning with a pale yel-low flame. Or if to themouth of a bottle contain-ing the materials for gene-rating hydrogen, Fig. 200,a cork, through which aglass tube is passed, beadjusted, and, after allow-ing the air in the bottleto be displaced to avoidan explosion, a light be ap-plied to the issuing gas, ittakes fire and burns in thesame manner. This is call-ed the philosophers the light is faintthe heat is very great—suf-ficient, indeed, to melt fineplatinum wire. The following experi-ment proves three facts atthe sa
Size: 2236px × 1118px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookde, booksubjectchemistry, booksubjectphysics
