[D9202ABK], Letter from Charles Nicholaus Wurth to Thomas Maguire (Edison Employee), June 1892
https://edisondigital.rutgers.edu/document/D9202ABK
Transcription
bear in mind the importance of not depositing the platinum thickly, but only in the very/thinnest layer which will make a good reflecting surface. I shall be very glad to get these as soon as you may be pleased to authorize their construction. With renewed thanks for your kindness, I am Very truly yours, S.P. Laugley Secretary Thomas A. Edison, Esq., Orange, N.J. Mr. Maguire The mirrors are finished and ready to be sent back to. San Tart[?] Washington. I could be better with the smallest ones, if the glass were polished from. The first pealinizing has spoiled them. Chas Werth