Faraday to James South   20 March 1839

R Institution | 20 March 1839

Dear Sir James,

I have examined the green matter of the water & there are two or three points which seem to refer it to an animal origin.

In the first place in putrifying it evolves Sulphuretted hydrogen[.]

When heated it blackens & fuzes like animal matter & evolves ammonia[.]

With potash its acts as if it were of an albuminous nature[.]

As to the shape motion &c &c of the filaments all these points are fully referred to in Dr. Grants letter¹[.]

Ever Dear Sir James | Your faithful Servant | M. Faraday

Sir J South | &c &c &c