Hale, W: Laboratory Manual of General Chemistry (Classic Rep

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Hale, W: Laboratory Manual of General Chemistry (Classic Rep

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Excerpt from A Laboratory Manual of General Chemistry

A special chapter has been introduced for the study of negative radicals. A differentiation is here made between the reactions of a few special reagents upon compounds before and after heating.

Finally, the highly objectionable method of recording in the laboratory those observations which are only to be trans ferred later to a so-called notebook is now eliminated. A student who but once engaged in this indefensible practice is far too prone in later years to record weighings and other data on scraps of paper. When such useless records seem to attain a reasonable degree of satisfaction to his untrained mind he may actually transfer them to a more desirable location, but neither to the credit of the location nor the student. This manual is so constructed that all questions under each heading are consecutively numbered. These same numbers appear also upon the opposite or blank pages and indicate positions for the records. Upon the form and accuracy of these records the student himself must expect the proper estimate of his scientific ability.

For the interest and care with which the manuscript has been read by Professor William G. Smeaton of this laboratory and for his many valuable suggestions the author wishes to express his gratitude and appreciation.

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