April 25, 1890
Merrs Bergmann & Co.,
New York City
INSULATION TEST FOR MR. INSULL
This experiment explains itself. Mr. Insull was furnished with data relative to the test made upon his orders
CUT OUT EXPERIMENT.
This was an experiment conducted by Mr. Edison on a cut out
SMALL AMPERE METER.
Experiment on a small ampere meter conducted by Mr. Kennelly under Mr. Edison's direction; data on this will be furnished if desired.
DEFLATION TEST ON [illegible]
This test was made upon the order of Mess Bergmann & Co
ELECTRIC METRE
Experiments on the Edison letter conducted by Mr. Edison
CALIBRATING METRE [illegible]
This experiment was conducted on the order of Messrs Bergmann & Co. DYNAMO AUTOMATIC REGULATOR
Experiment on a regulator for regulating pressure automatically
INSULATIONOF GUTTA-PARCHA
An experiment to ascertain how gutta-parcha resisted high tension

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