I think it's a typo. Does the original say 'and also'?
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Feebs11He did not fail to notice an old and dirty hat, cracked in several places, as also a lens and forceps lying on the chair.Thank you.
I think there is a missing comma (perhaps Gary mis-transcribed)
This is an example of ellipsis. The long form would have been "as also he did not fail to notice a lens and forceps.....". This woud have been cumbersome so her removed the superfluous, repeated, words (which I have italicised).