19 quotes
The history of gunpowder is associated with that of saltpetre, no comprehensive account of which was available.
A History of Greek Fire and Gunpowder (1960)
The Atomic Theory and the Periodic Law have been given prominence, since their neglect unfailingly leads to obscurity and triviality.
A Text-Book of Inorganic Chemistry (1921)
Very few experiments can, in the nature of things, be really crucial.
Higher Mathematics for Chemical Students (1911)
The extension of Black's method by the physicist Lavoisier led to the downfall of the purely qualitative theory of phlogiston, and gave to chemistry the true methods of investigation, and its first great quantitative law—the law of conservation of matter.
Higher Mathematics for Chemical Students (1911)
Disagreement between theory and experiment has proved a most potent agent in broadening theoretical views, and in making clear the necessity for new concepts or hypotheses.
Higher Mathematics for Chemical Students (1911)
Such ideas as those of matter, force, element, number, space, time, etc., came to us from the ancient Greeks.
A Short History of Chemistry (1937)
The earliest applications of chemical processes were concerned with the extraction and working of metals and the manufacture of pottery.
A Short History of Chemistry (1937)
We perceive clearly that theories and hypotheses are not accepted or rejected outright; they have their periods of activity, and then lie dormant for a time, only to be revived in a new form later on.
Higher Mathematics for Chemical Students (1911)
The Alexandrian chemists were very near to a recognition of gases.
A Short History of Chemistry (1937)
Wenzel and Richter, the latter... of most pronounced mathematical temperament, laid the foundations of stoichiometry, or "the art of measuring the chemical elements".
Higher Mathematics for Chemical Students (1911)
Dalton, the mathematical tutor, following up the lead of Newton, combined the whole of the results of quantitative measurement which had accumulated up to his time, in a comprehensive theory, based on the concept of the chemical atom.
Higher Mathematics for Chemical Students (1911)
The treatises written in Greek... in Alexandria, are the earliest known books on chemistry.
A Short History of Chemistry (1937)
Gunpowder was known to Roger Bacon and Albertus Magnus about 1250, but... I conclude that both obtained a knowledge of it from Arabic sources.
A History of Greek Fire and Gunpowder (1960)
There are not wanting, even to-day, chemists who advocate "purely chemical" methods in chemistry, and cannot appreciate the value of physical evidence in conjunction with mathematical calculations. We can only hope that their number is decreasing exponentially with time.
Higher Mathematics for Chemical Students (1911)
The fundamental materials from which we construct our picture of the universe may appear in different shapes, but there is really very little discontinuity between what seem at first sight very different views.
Higher Mathematics for Chemical Students (1911)
The statement of a law of nature involves the formation of a concept, or general idea, in which the likenesses of phenomena are collected, and the differences, in so far as they are not intimately involved in the nature of the case, are eliminated.
Higher Mathematics for Chemical Students (1911)
From the time when Guldberg and Waage gave quantitative form to the speculations of the physicist Berthollet, a clear conception of chemical equilibrium, in sharp contrast to an anthropomorphic theory of affinity dating back to Hippocrates and Barchausen, has yielded rich and abundant fruit.
Higher Mathematics for Chemical Students (1911)
It is clear, however, that the distinguishing mark of the whole development of theoretical chemistry and physics is the elimination of the anthropomorphic elements, especially specific sense-impressions, from the concepts. This process is called by Prof. M. Planck the objectification of the physical system.
Higher Mathematics for Chemical Students (1911)
The quantitative investigations of Black on the burning of lime and magnesia alba, in which the balance (previously characterized by the French chemist Jean Rey as "an instrument for clowns") was applied at every turn, led to the rejection of a hypothetical "principle of causticity," and replaced it by a "sensible ingredient of a sensible body," fixed air.
Higher Mathematics for Chemical Students (1911)