The Life of Robert Hare An American Chemist 1781 1858
The Life of Robert Hare An American Chemist 1781 1858
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" And, in adverting to formulae which then probably were much discussed, Hare said: "As with very few exceptions in formulae expressing the composition of organic substances, only four different letters are requisite, with the figures showing the relative propor- tions, the employment of symbols for that purpose is evi- dently highly advantageous. The student, therefore, is ad- SECOND PERIOD, 1818-1847 349 vised especially to overcome, by a proper degree of resolu- tion, any repugnance to the s...tudy of the formulae given, or others which may be resorted to in this or in other modern treatises of chemistry. A comparison of their formulae, re- spectively, will convey an idea of the difference in composition existing between the radicals in the preceding list. . . . " And he continues: " I adverted to the fact that certain elements may be substituted, the one for the other, without changing the crystalline form. Dumas has latterly held an analogous doctrine respecting the substitution, in organic products, of one element for another, or of a compound radical for an element, without "altering the general chem- ical type" as he calls it; and would have the bodies thus formed grouped together, constituting a natural family.
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To quickly assess the difficulty of the text, read a short excerpt:
" And, in adverting to formulae which then probably were much discussed, Hare said: "As with very few exceptions in formulae expressing the composition of organic substances, only four different letters are requisite, with the figures showing the relative propor- tions, the employment of symbols for that purpose is evi- dently highly advantageous. The student, therefore, is ad- SECOND PERIOD, 1818-1847 349 vised especially to overcome, by a proper degree of resolu- tion, any repugnance to the s...tudy of the formulae given, or others which may be resorted to in this or in other modern treatises of chemistry. A comparison of their formulae, re- spectively, will convey an idea of the difference in composition existing between the radicals in the preceding list. . . . " And he continues: " I adverted to the fact that certain elements may be substituted, the one for the other, without changing the crystalline form. Dumas has latterly held an analogous doctrine respecting the substitution, in organic products, of one element for another, or of a compound radical for an element, without "altering the general chem- ical type" as he calls it; and would have the bodies thus formed grouped together, constituting a natural family.
What to read after The Life of Robert Hare An American Chemist 1781 1858?
You can find similar books in the "Read Also" column, or choose other free books by Smith Edgar Fahs to read onlineMoreLess
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