you are using and the best, most definitive, way is to obtain and pass this along to us on this THREAD is to:
(1) Right-Click on the enlarged diagram,
(2) select the "Properties" in the pop-up window and then you will see the "URL address" in the middle of the next pop-up window you get,
(3) triple-click with your cursor somewhere on this URL address and this will highlight/block the entire address,
(4) then it's the normal copy and past

For e.g. - http://www.peterschmid.com/vacuum/1977_1985/617_95/1984_1985.jpg

This way I can follow along with this lesson... and maybe even contribute.

Sam