function startCrowdsales(uint256 _number) public onlyOwner {
    for (uint256 i = 0; i < _number; i++) {
      ForkRC crowd = new ForkRC(
        block.timestamp, 
        endTime,
        rate,
        wallet,
        tokenCap,
        minimumContribution,
        token,
        contributions
      );

      crowd.setBonusRates(bonusRanges, bonusValues);
      crowd.transferOwnership(msg.sender);
      crowdsaleList.push(address(crowd));
      emit CrowdsaleStarted(address(crowd));
    }
  }