When the amount of the wages payable to miners depends op. the quantity and quality of the minerals sent to the surface by them, such miners may, at their own cost, station a person (herein called a check-weigher) at the place at which such mineral is weighed to take an account of the weight thereof; and such check-weigher, or some other miner, may also be present when the sampler of the company samples the said mineral, and the said sampler shall divide the sample taken by him into three parts, and shall retain one of such parts for the use of the company, give another part to the check-weigher or such other miner for the miners, and deposit the remaining part with the purser of the company for future use, if either the company or the miners require that it should be assayed; and such remaining part shall be sealed up. in the presence of the check-weigher or such other miner, and retained by the company for assay, if required; the said check-weigher, or other miner shall not interrupt or interfere in any way with the weighing or sampling of the said mineral, and shall not enter, the assay office of the company, nor shall the absence of the check-weigher be a reason for delaying the said weighing and sampling.