Description | 'Dear Sir, We believe it was at a meeting of the Royal Society that Professor Porter recently presented a new device for magnifying the voice in connection with Phonographs and Gramaphones, if you have any report of the proceedings at which this new invention was brought to the notice of your Society, we should much like to have same togethor with any particulars attaching thereto. We shall be very pleased to pay for the copy of your journal, if that contains the desired particulars. Yours truly, Per pro L. Gaumont & Co., A C [Bournhead?], Manager'. |