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It was christmas time. Dr. Watson called upon his friend Sherlock Holmes to give him the complements of the season. He found him louging on a sofa, with a pile of crumpled morning papers, recently read, by his side. He did not fail to notice an old and dirty hat, cracked in several places as also a lens and forceps lying on the chair.

What does mean `as also' in this sentence?
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I think it's a typo. Does the original say 'and also'?
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He did not fail to notice an old and dirty hat, cracked in several places, as also a lens and forceps lying on the chair.

I think there is a missing comma (perhaps Gary mis-transcribed)
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Comments  
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.

I think there is a missing comma (perhaps Gary mis-transcribed)
Thank you.

Yes you are right. There is a comma before (as also).

But now also I don't understand what is (as also) in this sentence?

If it was (and also) I can understand this sentence.

But it is (as also).
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Semantically the same as "and also"[= as well as] . The author preferred to use "as also" [= as well as] .
"as also" means "in addition to"
This is an example of ellipsis. The full text would have read "as also he did not fail to notice a lens and forceps...", which would have been unnecessarily repetitive and therefore cumbersome.
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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).