A large quantity of the pipe is now being tested at my suggestion by the
Superintendent of Construction of the Johns Hopkins Hospital, at
Baltimore. I have not yet heard the results from him, but doubtless they
will be interesting. A brief summary of the results may be of some
interest.

The different makers of soil pipe generally used by plumbers hereabouts
are:

Mott & Company, Abendroth, Blakslee, Dighton, Phillips & Weeden, and
Bartlett, Hayward & Co.

On 4" extra heavy pipe my results have been as follows:

Percentage passed as good, single hub. 60 per ct. to 70 per ct.
Percentage passed as good, double. 20 per ct. to 80 per ct.
Percentage passed special castings,
including Y's and T's. 60 per ct.

5" pipe extra heavy:

Percentage passed as good, single hub. 25 per ct. to 35 per ct.
Percentage passed as good, double. No record.
Percentage special castings,
including Y's and T's. 60 per ct.

It has been stated to me by dealers that the tar coating does away with
the necessity of any such test as the oil; while I am not prepared to
acknowledge or deny the statement, it is well known that much poor pipe is
tar-coated and sold in the market as good, and when coated it is almost