355.(1) ²[In cases tried under Chapter XX or Chapter XXII] by a Magistrate of the first or second class and in all proceedings under section 514 (if not in the course of a trial), the Magistrate shall make a memorandum of the substance of the evidence of each witness as the examination of the witness proceeds. (2) Such memorandum shall be written and signed by the Magistrate with his own hand, and shall form part of the record. (3) If the Magistrate is prevented from making a memorandum as above required, he shall record the reason of his inability to do so, and shall cause such memorandum to be made in writing from his dictation in open Court, and shall sign the same, and such memorandum shall form part of the record.