Section 79. The certificate of inspection issued by the division, or by an insurance company for a boiler as required by section seventy, shall state the name of the owner and that of the user if they differ, the location, the number of the boiler, the date of the inspection and the maximum pressure at which it may be operated, and the signature of the inspector who made the inspection, and shall contain such extracts from the statutes as shall be deemed necessary by the board. It shall be so placed in the boiler room and protected from being soiled as to be easily read.