Wonders of Chemistry

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Thomas Y. Crowell Company, 1922 - Chemistry - 294 pages
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Page 2 - The air is not a simple element, as the ancients supposed, but is formed by the mingling of two gases, known to the chemist as oxygen and nitrogen, in the proportion of one part of the former to four parts of the latter. These gases are very unlike...
Page 99 - ... and even of philology, within the last fifty years, has established a multitude of Scriptural facts ; has cleared up a multitude of obscurities ; has rectified misrenderings and misinterpretations which no integrity or perspicacity could once avoid ; has decisively refuted the objections of enemies. The process is still going on, and will continue to go on. For it is the wonderful property of the book of God, that it has never yet been detected in a mistake, even when speaking on those subjects...
Page 64 - ... but it is by no means the fetish some people make of it. They would have you believe that it represents the height of the packer's art; and once having mastered it, they use it religiously for every weight, shape, and size of pack. The truth of the matter is that the style of hitch should be varied according to the use to which it is to be put. The Diamond is good because it holds firmly, is a great flattener, and is especially adapted to the securing of square boxes. It is celebrated because...
Page 6 - ... as 4 ounces of water in every cubic yard. At 100 degrees F. it holds somewhat less than 4 ounces; at 80 degrees, about 2 ounces; at 50 degrees, a little over three quarters of an ounce ; and at the freezing point of water (32 degrees) it holds slightly more than one third ounce per cubic yard. When air contains as much water vapor as it can hold, it is said to be saturated. What would happen if air saturated with water vapor at 90 degrees were suddenly cooled down to 60 degrees? What happens...
Page 6 - The maximum amount of water vapor that the air can hold depends on the temperature of the air...
Page 130 - Pure cellulose is a carbohydrate (see p. 66) ; it consists of six atoms of carbon, ten atoms of hydrogen, and five atoms of oxygen.
Page 26 - To provide water in sufficient quantities to supply cities has been one of the great problems of civilized mankind, but it is only during the last fifty years or so that the necessity for purifying water for drinking purposes has been fully taken into account.
Page 19 - German physicist, who lived 1686-1736, invented the mercurial thermometer, and made the scale that gives the boiling point of water at 212 degrees and the freezing point at 32 degrees.
Page 176 - The depolarizing action is a gradual one, however, so that if the circuit is kept closed for any length of time, the EMF and current given by the cell will suffer great diminution.

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