I have an image slider. When I try toe retrieve the images from my server, the images are properly displayed. (http://stthomasmountmtc.org/index.html)
However, when I try to retrieve the same images from Dropbox, the images are not displayed/retrieved. (http://stthomasmountmtc.org/index1.html)
<img src="https://www.dropbox.com/s/woart55urbw792u/image1.jpg" alt="image" />
The link in your code opens the gallery feature of Dropbox, which is a HTML webpage, not an image file. The direct link for that image is:
You should always set the source of an image tag in HTML to an URL which outputs an image - and not a webpage containing an image.