Caption: Booklet - Addresses from Inauguration of Noyes
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1 ber of Important deri itiv which tributed much \ ard tl trie op of the relation betw in indi o and tfc pounds. In 1870, he found thai so the work he WBB doing seemed to COY-r much the same ground a^ som \v< whid Kekule had undertaken and out of sci« tific i curtesy he allowed the ma to lie dormant for ei^hi 3 ars. In W 8 , I Kekule had published nothing further of importance, Ba per returned to the probs lem and in l S0 lie obtained a succ 1 synthesis of indigo. With the brilliant success of alizarin in mind patents R re taken out, and it was generally expect I that the manufacture of the artific d dye would soon become of commercial importance. But these hopes of immediate success were not realized. Two principal [ifficulties were encountered. The original methods of synthesis involved a 1 rable number of difficult transf. rmation between the raw material, toluen and th< finished dye, indigo. These transformations requin d a xery large amouni of careful scientific study before the >ndi1 >ns could be found under which they could b« carried out in ways thai would be < mical of time and material. But when this side of the problem had reeeh ed a par d solution as 1 he result of fifteen w a r s l more of work, a second difficulty presented it-self in the magnitude of the inton involved. Ii is estimated thai the w rid uses r tbout . ),()()() Ions of indmo in a 3 tr 0W, even wilh Ihc perreeted methods it takes about four pounds of toluene U) \\u\\\\ "'i'' pound of indi > and the present production of toluene 1 only about 5.000
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