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Unlike some other reproductions of classic texts (1) We have not used OCR(Optical Character Recognition), as this leads to bad quality books with introduced typos. (2) In books where there are images such as portraits, maps, sketches etc We have endeavoured to keep the quality of these images, so they represent accurately the original artefact. Although occasionally there may be certain imperfections with these old texts, we feel they deserve ...

Excerpt from The Synthesis of Di-Aryl Thiophenes, Di-Aryl Selenophenes, and Related Compounds: DissertationIt is apparent therefore, that although the di-aryl thiophenes have been prepared before, yet up to the present, no entirely satisfactory method has been developed for preparing them in a pure state. Hereto fore, there always resulted a mixture of the two isomers and the yield obtained was very small.About the PublisherForgotten Books pub...

Excerpt from The Synthesis of Di-Aryl Thiophenes, Di-Aryl Selenophenes, and Related Compounds: DissertationIt is apparent therefore, that although the di-aryl thiophenes have been prepared before, yet up to the present, no entirely satisfactory method has been developed for preparing them in a pure state. Hereto fore, there always resulted a mixture of the two isomers and the yield obtained was very small.About the PublisherForgotten Books pub...