¶1Fernando Sierra Berdecia, Commissioner of Labor (now Secretary of Labor)
¶2Respondent merely filed a motion to dismiss for lack of facts constituting a cause of action.
“1. ... in requiring the introduction of evidence to determine the merits of respondent’s motion to dismiss instead of deciding the same on the pleadings of the complaint.
“2. ... in dismissing the complaint and holding that the same lacked merit under the theory that the respondent’s business is not covered by Mandatory Decree No. 15.
“3. ... in refusing to admit in evidence a communication dated February 14, 1951, . . . addressed to Mr. Agustín López Parrilla, as Vice President of the Lime Industry Union, Fraternidad Sur 441, Barrio Obrero, Fajardo, Puerto Rico, by Mr. Russel Sturgis, in his capacity as Territorial Director for Puerto Rico of the Hours and Wages Division of the Department of Labor of the United States.
“4. ... in admitting the testimony of Mr. Cándido Oli-veras, former president of the Minimum Wage Board of Puerto Rico, as to what he believed had been the intention of the Board in approving Mandatory Decree No. 15.”
¶3In discussing the first error, the complaint cites several cases decided at a time when the Code of Civil Procedure was applicable to ordinary civil actions and when the question of lack of facts in a complaint was raised by demurrer. At that time, the sufficiency of that averment *165was solely determined on the basis of the facts alleged therein and it was not permissible for either of the parties to introduce evidence in order to support the sufficiency or insufficiency of the complaint. However, at present the situation is different. By express provision of ;§ 2 of Act No. 150 of May, 1950 (pp. 406, 410), amending Act No. 10 of 1917, “in all cases prosecuted under this Act (No. 10 of 1917) the Rules of Civil Procedure shall be applied insofar as they are not in conflict with the specific provisions hereof.” Thus, by express provision of the statute regulating the matter, the Rules of Civil Procedure are applicable to cases of claims for wages such as the case at bar. See Cáceres v. García, 71 P.R.R. 378. By virtue of Rule 7(c) demurrers were abolished.
¶4However, we believe that the trial court committed the second error assigned. It appears from the complaint that Flor Morales, the laborer, worked for the respondent as a bulldozer operator in a business devoted “to the manufacture, extraction, sale and distribution of lime.” Although the word “quarry” or the phrase “quarrying industry” are not specifically used in the complaint, however, it specifically mentions Mandatory Decree No. 15, applicable to workers in the quarrying industry in Puerto Rico. Furthermore, by the evidence introduced by both parties it clearly appears that the main issue in the case was whether petitioner worked for the respondent in a quarrying industry.
¶5*167Mandatory Decree No. 15 of the Minimum Wage Board, of October 22, 1948, which took effect thirty days after its enactment, provides that “the quarrying industry embraces every act, process, operation, work or service which may be necessary or related to the extraction, transportation, crushing or delivery of stone, gravel, ‘tosca’ and quarry dust.” The mandatory decrees of the Minimum Wage Board must be construed in harmony with the provisions of the Minimum Wage Act. Lugo v. Marini, 72 P.R.R. 483.
¶6As admitted by the respondent, he is the owner of the “Planta de Cal Hicaco” which “is composed of units and machinery located at barrio Puerto Real of Fajardo.” There he has “a pair of ovens, a water paint factory, a lime pul-verizer and a hydrated lime plant” and “in order to obtain the products of this plant, which are hydrated lime, calcium carbonate, slaked lime and water paint powder (calcical), the raw material is extracted from a mine located on Hicaco Isle facing the Fajardo harbor. The lime is extracted from the mine in blocks which are crushed and treated ... Of course, the lime blocks are extracted from the mine by means of dynamite and by a process similar to the one employed in the quarry. A bulldozer is also used to gather and clear the residue.”
¶7On the other hand, the respondent’s witness, José Antonio Berrocal, who claimed to be a chemical engineer, testified that his experience “with respect to quarries properly speaking consisted of working at the ‘Hicaco’ lime plant where stone %vas extracted . . . Stone, the composition of which is calcium carbonate at a high degree of purity.'” Asked whether limestone was extracted there, he answered, “Yes, sir.” (Italics ours.) Considering former admissions of the respondent, Berrocal’s testimony, and the rest of the *168evidence appearing of record, we must conclude that the petitioner worked in a quarrying industry, as defined by Mandatory Decree No. 15, inasmuch as he performed an act, process, operation, work or service necessary and related to the extraction, transportation, crushing or delivery of limestone.
¶8The fact that the respondent’s main business is the working of a plant to manufacture paint in no way means that the work performed in Cayo Hicaco to obtain the raw material does not constitute a “quarrying industry” for the purpose of Mandatory Decree No. 15, irrespective of the industry or main business primarily carried on by the respondent. There may be a subsidiary or incidental industry within a main industry. For example, in the cement manufacturing industry, the working of a quarry, as is the case here, may be a subsidiary or incidental industry. Perhaps, the same thing occurs in the sugar or in the dairy industry, where the agricultural phase may be a subsidiary industry. See Commissioner of Labor v. San Miguel Fertilizer Corp., 73 P.R.R. 327; Commissioner of Labor v. Llamas, 73 P.R.R. 847; Phillips Co. v. Walling, 324 U. S. 490. That is the case here with the quarry worked by the respondent in Hicaco Isle. A mandatory decree may also be applicable to one phase of the business or industry and inapplicable to the rest. The motion to dismiss for insufficiency should have been dismissed.
¶9For the foregoing reasons and inasmuch as the case will be remanded to the Superior Court, where it originated, we deem it unnecessary to discuss and decide the other two errors assigned by appellant.
¶10The “order and judgment” appealed from must be reversed and the case remanded to .the Superior Court, Huma-cao Part, for further proceedings consistent with this opinion.
¶11 See the Constitution of the Commonwealth of Puerto Rico, Article IV, >$ 6, 1 L.P.R.A., p. 196.
¶12 See § 25 of Act No. 8 of April 5, 1941 (p. 302) as amended by Act No. 451 of May 14, 1947 (pp. 950, 968).
¶13 In view of the fact that the respondent did not file his answer on time, the petitioner asked that judgment be rendered in his favor pursuant to paragraph 2 of $ 3 of Act of 1917, supra,, as amended by Act No. 182 of May 12, 1948 (p. 470). Petitioner’s motion was dismissed by the trial court by decision of September 2, 1952. The present proceeding, however, •does not involve any question connected with said decision.
¶14 Of course, the demurrers are still in force in those cases where the Rules of Civil Procedure do not apply.
¶15 It was precisely on this bulldozer or power shovel that the claimant worked.