Fine- in Very Good+ jacket. 8vo-over 7¾"-9¾" tall. 178 pages. "The development of the concept of valency has provided one of the major unifying contributions to the growth of chemistry as a science. Dr. Palmer preverses the historical look of the different chronological stages by including extracts from the publications of the most influential scienists, in the nomenclature and terminology of their time; quotations from German are however accompanied by an English translation." FINE-HARDCOVER (5 words written in pen on title page, else fine), VERY GOOD+ DUST JACKET.
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