A. B. Frenzel, of St George's Club writes; 'In your issue of August 5th page 111, under "Miscellanea," you refer to a yacht propelled by electricity as being the first one built in the United States, and run by storage batteries. As your information is erroneous, I take pleasure in righting a journal of your prominence. About three years ago there was constructed at the works of C. H. Delemeter and Co., a monitor for submarine and surface torpedo duty under the patents of Mr. Tuck. The boat was equipped with storage batteries, charged from a dynamo, and the motive power was the stored electricity transmitted to the propeller shaft through a small dynamo."