916 Ch. 31. No. 15.] Weights and Measures. Statement on wrapper or in invoice deemed a written warranty. Invoice a sufficient warranty. Employer charged entitled to have rcal offender brought before the court. Limitation. hundred and eighty dollars, unless he proves to the satis- faction of the court that when he gave the warranty he had reason to believe that the statements or descriptions contained therein were true. (8) For the purposes of the foregoing provisions a statement on any container or any wrapper, band or label affixed thereto or delivered therewith or a statement contained in an invoice, shall be deemed to be a written warranty. (9) An invoice describing the weight or measure or number of the article shall be a sufficient warranty notwith- standing that it contains no words or express warranty or was delivered after the purchase of the article. 56. Where an employer or principal is charged with an offence under section 51, he shall be entitled on information duly laid by him, and on giving not less than three days’ notice of his intention to the prosecution, to have any other person whom he charges as the actual offender brought before the court at the time appointed for hearing the charge, and, if after the commission of the offence has been proved, the employer or principal proves to the satisfaction of the court that he had used due diligence to enforce the execution of this Ordinance and that the said other person had committed the offence in question without his consent, connivance or wilful default, the said other person shall be summarily convicted of the offence and the employer or principal shall be exempt from any penalty: Provided that the prosecution shall have in any such case the right to cross-examine the employer or principal if he gives evidence and any witnesses called by him in support of his charge and to call rebutting evidence. The person so convicted shall, in the discretion of the court, be also liable to pay any costs incidental to the proceedings. 57. A prosecution in respect of an offence by a retailer under section 51, shall not be instituted after the expiration of twenty-eight days from the time when the offence was committed, nor unless either notice was given to the defendant on the day of the commission of the alleged offence