
          sent by the Hartford boat, I will forward the money
to Dr. [James] Chilton 263 Broadway. Possibly I may not
be able to do it immediately but it may be depended
upon within a reasonable time. I wish
it made on the construction most approved by yourself.

One word more. Dr.Mitchell's proportions are 1 3/4th
bicarbonate soda, 24 fluid ounces of water, 9 fluid ounces
of common sul. acid. Permit me to inquire what
he means by fluid ounces. Does he intend ounces
as they would be measured in a glass graduated
for measuring water? This what I
have supposed as it will make the quantity
of acid present nearly sufficient to neutralize
the soda.

In sincerity and high esteem
yours.  John Johnston.

J. Torrey  M. D.

PS - Dr. [Joseph] Barratt informs me he intends to visit
New York soon and may be there even before
this reaches you since I shall send it by private
conveyance.

        