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[[preprinted]] 162 [[/preprinted]]
[[margin]] Protal [[/margin]]
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and which gave him the idea that my A might help him out making his Proton [[Protal]] by water. Says it costs him 3 1/2 cents per lb. to make. I advised him either to dip in liquid A and bakelize a coat with Varnish stack and dry.  Or simply use his vegetable ivory as a filter in conjunction with solid A or B or liquid or partly A. [[underlined]] explained him everything.[[/underlined]] He took careful notes.  I gave him some samples of A and liquid A we had managed to save
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163
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in fire.  The powdered A was in 3 or 4 flat little tin boxes. the liquid A in a pint tin can cylindrical.  Ditto the varnish stock.  Later on Thurlow went back to laboratory and [[strikethrough]] [[recreated?]] [[/strikethrough]] succeeded in getting a chunck of A from that A up stairs which was in tray in photographic room and which had undergone some melting.  In order to make sure whether this A was still A I tried it before Wiechmann and Thurlow with a lighted match.  Wiechmann left here
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