
          season, if Providence favors, I will collect some specimens 
for you if they would be desirable. They are
found in Bristol Lincoln Co. some four or five
miles from Pemaquid Point Light House.

Our apparatus for solidifying car. acid performs
this operation on a small scale to admiration. I am 
about adding a gauge to determine the height
of this liquid in the receiver. I have lately prepared
quite a number of the tubes of liquid acid.
I think I prefer Faraday's method of sealing
hermetically; strange as it may seem I have never
yet succeeded in cementing a cap on so as to stand
perfectly for more than a day or two!
Very Repectfully
Yours etc. John Johnston 
        