 
         scrollView.snp_remakeConstraints { (make) -> Void in
             make.left.right.top.equalTo(self.view)
-            make.bottom.equalTo(startBrowsingButton.snp_top)
+            make.bottom.equalTo(self.startBrowsingButton.snp_top)
         }
 
         for i in 0..<IntroViewControllerUX.NumberOfCards {

            slideVerticalScaleFactor = 1.33
        }

        //

        for i in 0..<IntroViewControllerUX.NumberOfCards {
            slides.append(UIImage(named: "slide\(i+1)")!)
        }

        //

        startBrowsingButton = UIButton()
        startBrowsingButton.backgroundColor = IntroViewControllerUX.StartBrowsingButtonColor

        let introView2 = UIView()
        introViews.append(introView2)
        addLabelsToIntroView(introView2, text: IntroViewControllerUX.Card2Text, title: IntroViewControllerUX.Card2Title)

        // Card 3

